Overview

This file collects the illustration briefs for every anatomy structure in the InjuryAtlas shoulder module. Every brief follows the same consistent visual style: clean, modern medical illustration, matte-clay 3D rendering style consistent with the InjuryAtlas 3D model, soft studio lighting, a neutral warm-grey background (#F0EDE8), a teal/blue highlight color (#2A9D8F) for the structure of interest, no faces or identifying features, a gender-neutral body, and labels set in clean sans-serif type (Inter or similar).

Each structure gets a hero anatomy illustration (the structure shown clearly in its normal anatomical context), a highlighted anatomy diagram (the structure picked out in teal against surrounding grey-toned anatomy), a cross-sectional diagram where relevant to understanding depth or layering, and suggested highlights for the future 3D model (notes for how the interactive 3D model should isolate or animate the structure).

Bones

Clavicle — Hero Anatomy Illustration

Subject: Full shoulder girdle and upper ribcage, front-facing view, showing the clavicle (collarbone) running horizontally from the sternum to the shoulder.
Camera angle/pose: Anterior (front) view, torso upright, arms relaxed at sides, camera at chest height, slight downward tilt.
Highlighted structures: Clavicle rendered in teal/blue (#2A9D8F); surrounding ribcage, scapula, and humerus in neutral matte-clay grey.
Labels needed: "Clavicle (collarbone)," "Sternum," "Acromion," "Shoulder blade (scapula)."
Mood/purpose: Calm, clear orientation piece — this is often the first anatomy image a reader sees, so it should feel approachable, not clinical or intimidating.

Clavicle — Highlighted Anatomy Diagram

Subject: Isolated clavicle bone, shown alone with faint ghost outlines of the sternum and scapula for context.
Camera angle/pose: Superior-anterior three-quarter view, bone floating in neutral space.
Highlighted structures: Entire clavicle in teal/blue; ghost outlines of neighboring bones in 20%-opacity grey.
Labels needed: "Sternal end," "Acromial end," "S-curve shape."
Mood/purpose: Isolate the bone's distinct curved shape so readers understand its form independent of surrounding structures.

Clavicle — Cross-Sectional Diagram

Subject: Cross-section of the clavicle shaft at its midpoint, showing the bone's roughly cylindrical, slightly flattened shape.
Camera angle/pose: Straight-on cut view, perpendicular to the bone's long axis.
Highlighted structures: Cortical (outer) bone in teal/blue; inner cancellous bone in lighter neutral grey.
Labels needed: "Cortical bone," "Cancellous bone."
Mood/purpose: Educational, showing why this bone is a common fracture site due to its shape and subcutaneous position.

Clavicle — Suggested 3D Model Highlights

Isolate the clavicle with a soft teal glow on tap/click.
Animate a subtle rotation showing the S-curve from above and from the front.
Allow toggling of the sternoclavicular and acromioclavicular joint ends independently.

Scapula — Hero Anatomy Illustration

Subject: Full upper back and shoulder, posterior (back) view, showing the scapula's flat, triangular shape against the ribcage.
Camera angle/pose: Posterior view, torso upright, arms relaxed, camera at upper-back height.
Highlighted structures: Scapula in teal/blue; ribcage and spine in neutral grey.
Labels needed: "Shoulder blade (scapula)," "Spine of scapula," "Acromion," "Glenoid (socket)."
Mood/purpose: Establish the scapula's role as the foundation the arm moves from — grounded, structural feel.

Scapula — Highlighted Anatomy Diagram

Subject: Isolated scapula, shown from a slightly rotated posterior-lateral angle to reveal its key landmarks.
Camera angle/pose: Three-quarter posterior-lateral view, bone floating in neutral space.
Highlighted structures: Full scapula in teal/blue, with the glenoid fossa in a slightly deeper shade for emphasis.
Labels needed: "Glenoid fossa (socket)," "Acromion," "Coracoid process," "Spine," "Medial (inner) border," "Lateral (outer) border."
Mood/purpose: Clarify the scapula's landmarks for readers learning terms used across injury and exercise pages.

Scapula — Cross-Sectional Diagram

Subject: Not applicable in the traditional bone cross-section sense; instead, a "peel-back" diagram showing the scapula's position sandwiched between back muscles and the ribcage.
Camera angle/pose: Side (lateral) cutaway view of the upper back and ribcage.
Highlighted structures: Scapula in teal/blue; surrounding muscle layers in neutral grey with soft transparency.
Labels needed: "Scapula," "Ribcage," "Scapulothoracic space."
Mood/purpose: Help readers visualize how the scapula glides across the ribcage, supporting the scapulothoracic joint concept.

Scapula — Suggested 3D Model Highlights

Isolate the scapula with teal glow; allow independent rotation to show anterior and posterior surfaces.
Animate scapular movements (elevation, depression, protraction, retraction, upward rotation) as a looping demo.
Link tap-points on acromion, coracoid process, and glenoid fossa to their glossary definitions.

Upper Arm Bone (Humerus, Proximal) — Hero Anatomy Illustration

Subject: Shoulder and upper arm, front-facing view, showing the head of the humerus seated in the shoulder socket.
Camera angle/pose: Anterior view, arm relaxed at side, camera at shoulder height.
Highlighted structures: Proximal humerus (head, neck, and upper shaft) in teal/blue; scapula and clavicle in neutral grey.
Labels needed: "Upper arm bone (humerus)," "Head of humerus," "Greater tubercle," "Lesser tubercle."
Mood/purpose: Establish how the ball-shaped top of the humerus fits into the shallow socket, foundational for understanding mobility and instability.

Upper Arm Bone (Humerus, Proximal) — Highlighted Anatomy Diagram

Subject: Isolated proximal humerus, shown alone with the rounded head, tubercles, and bicipital groove visible.
Camera angle/pose: Anterior-lateral three-quarter view, bone floating in neutral space.
Highlighted structures: Full proximal humerus in teal/blue, with the bicipital groove marked in a deeper accent line.
Labels needed: "Head of humerus," "Greater tubercle," "Lesser tubercle," "Bicipital groove," "Surgical neck."
Mood/purpose: Clarify landmarks referenced in rotator cuff tendon attachment and biceps tendon pages.

Upper Arm Bone (Humerus, Proximal) — Cross-Sectional Diagram

Subject: Cross-section through the humeral head, showing the smooth cartilage-covered surface and underlying bone.
Camera angle/pose: Coronal (front-to-back) slice through the joint.
Highlighted structures: Cartilage surface in a lighter teal tint; underlying bone in matte grey.
Labels needed: "Articular cartilage," "Bone (humeral head)."
Mood/purpose: Support explanations of joint surface health and osteoarthritis.

Upper Arm Bone (Humerus, Proximal) — Suggested 3D Model Highlights

Isolate the proximal humerus with teal glow, showing where the four rotator cuff tendons attach (greater and lesser tubercles).
Animate the "ball rolling in the socket" motion during arm elevation.

Joints

Glenohumeral (Shoulder Socket) Joint — Hero Anatomy Illustration

Subject: Full shoulder joint complex, showing the humeral head seated in the glenoid fossa, surrounded by the joint capsule.
Camera angle/pose: Anterior-lateral three-quarter view, arm relaxed at side.
Highlighted structures: Humeral head and glenoid fossa in teal/blue; joint capsule shown as a soft, semi-transparent grey envelope.
Labels needed: "Glenohumeral joint (shoulder socket joint)," "Head of humerus," "Glenoid fossa," "Joint capsule."
Mood/purpose: Communicate the "ball in a shallow socket" concept that explains both the shoulder's mobility and its vulnerability to instability.

Glenohumeral (Shoulder Socket) Joint — Highlighted Anatomy Diagram

Subject: Close-up of the joint alone, capsule removed, showing the ball-and-socket relationship with the labrum visible around the socket rim.
Camera angle/pose: Direct lateral view, as if looking straight into the socket.
Highlighted structures: Glenoid labrum in a deeper teal accent; humeral head and glenoid bone in lighter teal/blue; surrounding tissue in neutral grey.
Labels needed: "Labrum," "Glenoid fossa," "Humeral head."
Mood/purpose: Clarify the labrum's role in deepening the socket, supporting the labral tear/SLAP lesion injury page.

Glenohumeral (Shoulder Socket) Joint — Cross-Sectional Diagram

Subject: Sagittal (side-to-side) cross-section through the joint, showing the capsule, labrum, cartilage, and surrounding rotator cuff tendons in layered relationship.
Camera angle/pose: Straight lateral cutaway.
Highlighted structures: Joint capsule and labrum in teal/blue; rotator cuff tendon layer in a lighter accent; bone in neutral grey.
Labels needed: "Joint capsule," "Labrum," "Rotator cuff tendon," "Humeral head," "Glenoid fossa."
Mood/purpose: The single most useful "how it all fits together" image for readers piecing together anatomy across multiple pages.

Glenohumeral (Shoulder Socket) Joint — Suggested 3D Model Highlights

Allow the capsule to fade to semi-transparent so users can see the ball-and-socket relationship beneath it.
Animate the full range of motion (flexion, abduction, rotation) with the joint highlighted throughout.

Acromioclavicular (AC) Joint — Hero Anatomy Illustration

Subject: Top of the shoulder, showing the small joint where the clavicle meets the acromion.
Camera angle/pose: Superior-anterior three-quarter view, zoomed to the top-of-shoulder region.
Highlighted structures: AC joint (clavicle end and acromion end) in teal/blue; rest of shoulder girdle in neutral grey.
Labels needed: "Acromioclavicular (AC) joint," "Clavicle," "Acromion."
Mood/purpose: Precise and localized — this joint is small and easy to miss, so the illustration should zoom in confidently.

Acromioclavicular (AC) Joint — Highlighted Anatomy Diagram

Subject: Close-up of the AC joint with its supporting ligaments visible.
Camera angle/pose: Direct anterior-superior view.
Highlighted structures: Joint surfaces in teal/blue; AC ligament and coracoclavicular ligaments in a lighter accent line.
Labels needed: "AC ligament," "Coracoclavicular ligament," "Clavicle," "Acromion."
Mood/purpose: Support the AC joint injury page by showing exactly which ligaments are involved in a separation.

Acromioclavicular (AC) Joint — Cross-Sectional Diagram

Subject: Cross-section through the joint showing the small disc of cartilage between the two bone ends.
Camera angle/pose: Coronal slice, straight-on.
Highlighted structures: Cartilage disc in light teal; bone ends in neutral grey.
Labels needed: "Cartilage disc," "Clavicle," "Acromion."
Mood/purpose: Explain why this joint, despite being small, can be a source of clicking or pain.

Acromioclavicular (AC) Joint — Suggested 3D Model Highlights

Isolate joint with teal glow; show a subtle "step-off" animation to illustrate what a separated AC joint looks like versus normal.

Sternoclavicular (SC) Joint — Hero Anatomy Illustration

Subject: Center of the chest, showing where the clavicle meets the sternum (breastbone).
Camera angle/pose: Direct anterior view, chest centered in frame.
Highlighted structures: SC joint in teal/blue; sternum and clavicle in neutral grey.
Labels needed: "Sternoclavicular (SC) joint," "Sternum (breastbone)," "Clavicle."
Mood/purpose: Orient readers to this often-overlooked joint at the base of the shoulder girdle.

Sternoclavicular (SC) Joint — Highlighted Anatomy Diagram

Subject: Close-up of the joint with its stabilizing ligaments visible.
Camera angle/pose: Anterior-superior three-quarter close-up.
Highlighted structures: Joint capsule and ligaments in teal/blue.
Labels needed: "Sternoclavicular ligament," "Costoclavicular ligament."
Mood/purpose: Support understanding of one of only two joints connecting the arm to the main skeleton.

Sternoclavicular (SC) Joint — Cross-Sectional Diagram

Subject: Cross-section showing the joint's small fibrocartilage disc.
Camera angle/pose: Coronal slice.
Highlighted structures: Disc in light teal; bone ends in neutral grey.
Labels needed: "Fibrocartilage disc."
Mood/purpose: Explain the joint's limited but important range of motion.

Sternoclavicular (SC) Joint — Suggested 3D Model Highlights

Isolate with teal glow; animate the subtle rotation and gliding motion that occurs here during arm movement.

Scapulothoracic Joint (Scapulothoracic Articulation) — Hero Anatomy Illustration

Subject: Upper back, showing the scapula gliding across the back of the ribcage.
Camera angle/pose: Posterior-lateral three-quarter view, torso in neutral standing posture.
Highlighted structures: The gliding interface between scapula and ribcage in teal/blue, shown as a soft glowing plane; scapula and ribs in neutral grey.
Labels needed: "Scapulothoracic joint (functional, not a true joint)," "Scapula," "Ribcage."
Mood/purpose: Explain a "joint" that isn't a joint in the traditional sense, so framing should feel clarifying rather than technical.

Scapulothoracic Joint — Highlighted Anatomy Diagram

Subject: Side view showing the muscle layer (serratus anterior) that lies between the scapula and ribcage.
Camera angle/pose: Lateral cutaway.
Highlighted structures: Serratus anterior muscle in a lighter teal accent; scapulothoracic gliding plane in teal/blue.
Labels needed: "Serratus anterior," "Scapula," "Ribcage."
Mood/purpose: Connect this joint concept directly to the serratus anterior punch exercise.

Scapulothoracic Joint — Cross-Sectional Diagram

Subject: Cross-section through the upper back showing the layered relationship of scapula, muscle, and ribcage.
Camera angle/pose: Transverse (horizontal) slice through the upper back.
Highlighted structures: Gliding plane in teal/blue; muscle layers in neutral grey with soft transparency.
Labels needed: "Scapula," "Serratus anterior," "Ribcage."
Mood/purpose: Reinforce the layered anatomy for readers connecting posture and movement concepts.

Scapulothoracic Joint — Suggested 3D Model Highlights

Animate scapular gliding across the ribcage during arm-raising, synced with glenohumeral joint movement to show scapulohumeral rhythm.

Rotator Cuff Muscles

Supraspinatus — Hero Anatomy Illustration

Subject: Posterior-superior view of the shoulder blade, showing the supraspinatus muscle running along the top of the scapula to the humerus.
Camera angle/pose: Posterior-superior three-quarter view, arm relaxed.
Highlighted structures: Supraspinatus muscle and tendon in teal/blue; scapula, humerus, and other muscles in neutral grey.
Labels needed: "Supraspinatus," "Supraspinatus tendon," "Greater tubercle (attachment site)."
Mood/purpose: This is the most commonly injured rotator cuff muscle, so the illustration should clearly show its exposed position beneath the acromion.

Supraspinatus — Highlighted Anatomy Diagram

Subject: Isolated supraspinatus muscle and tendon, shown alone with faint ghost outlines of the scapula and humerus.
Camera angle/pose: Superior view looking down onto the top of the shoulder blade.
Highlighted structures: Full muscle belly and tendon in teal/blue.
Labels needed: "Muscle belly," "Tendon," "Attachment point (greater tubercle)."
Mood/purpose: Isolate the muscle's shape and path so readers can picture it independent of surrounding structures.

Supraspinatus — Cross-Sectional Diagram

Subject: Cross-section through the subacromial space, showing the supraspinatus tendon passing beneath the acromion.
Camera angle/pose: Coronal slice through the shoulder.
Highlighted structures: Supraspinatus tendon in teal/blue; acromion and subacromial bursa in neutral grey with light accent.
Labels needed: "Supraspinatus tendon," "Acromion," "Subacromial bursa," "Subacromial space."
Mood/purpose: This is the key image for explaining impingement — should clearly show how little room the tendon has to move.

Supraspinatus — Suggested 3D Model Highlights

Isolate with teal glow; animate tendon movement beneath the acromion during arm elevation to illustrate impingement risk zones.

Infraspinatus — Hero Anatomy Illustration

Subject: Posterior view of the shoulder blade, showing the infraspinatus muscle covering most of the back of the scapula.
Camera angle/pose: Direct posterior view, arm relaxed at side.
Highlighted structures: Infraspinatus in teal/blue; surrounding scapula and muscles in neutral grey.
Labels needed: "Infraspinatus," "Attachment point (greater tubercle)."
Mood/purpose: Show this muscle's broad coverage of the back of the shoulder blade and its role in external rotation.

Infraspinatus — Highlighted Anatomy Diagram

Subject: Isolated infraspinatus muscle with fiber direction visible.
Camera angle/pose: Posterior three-quarter view, muscle floating with faint scapula outline.
Highlighted structures: Muscle belly and tendon in teal/blue, with fiber lines in a subtle darker tone.
Labels needed: "Muscle belly," "Tendon," "Fiber direction."
Mood/purpose: Help readers connect this muscle to the external rotation with band exercise.

Infraspinatus — Cross-Sectional Diagram

Subject: Cross-section through the back of the shoulder showing infraspinatus in relation to teres minor and the scapula.
Camera angle/pose: Transverse slice through the posterior shoulder.
Highlighted structures: Infraspinatus in teal/blue; teres minor in a lighter accent tone; scapula in neutral grey.
Labels needed: "Infraspinatus," "Teres minor," "Scapula."
Mood/purpose: Clarify how these two muscles sit next to each other, since they're often confused.

Infraspinatus — Suggested 3D Model Highlights

Isolate with teal glow; animate external rotation movement to show the muscle contracting and shortening.

Teres Minor — Hero Anatomy Illustration

Subject: Posterior view of the shoulder blade, showing the smaller teres minor muscle just below the infraspinatus.
Camera angle/pose: Posterior-lateral three-quarter view.
Highlighted structures: Teres minor in teal/blue; infraspinatus and scapula in neutral grey.
Labels needed: "Teres minor," "Infraspinatus (neighboring muscle)."
Mood/purpose: Show this smaller, often-overlooked muscle clearly distinguished from its larger neighbor.

Teres Minor — Highlighted Anatomy Diagram

Subject: Isolated teres minor muscle, shown alone with a faint scapula outline.
Camera angle/pose: Posterior-lateral three-quarter view, muscle floating in neutral space.
Highlighted structures: Full muscle in teal/blue.
Labels needed: "Origin (scapula)," "Insertion (greater tubercle)."
Mood/purpose: Clarify its small size and precise path relative to the more prominent infraspinatus.

Teres Minor — Cross-Sectional Diagram

Subject: Cross-section through the lower portion of the scapula, showing teres minor's position relative to the axillary nerve.
Camera angle/pose: Transverse slice.
Highlighted structures: Teres minor in teal/blue; axillary nerve nearby in a subtle contrasting tone.
Labels needed: "Teres minor," "Axillary nerve (nearby structure)."
Mood/purpose: Support anatomy education around nerve proximity for advanced readers.

Teres Minor — Suggested 3D Model Highlights

Isolate with teal glow; pair with infraspinatus toggle so users can see both external rotators together or separately.

Subscapularis — Hero Anatomy Illustration

Subject: Anterior view with the scapula partially rotated to reveal the subscapularis muscle on the front surface of the shoulder blade (normally hidden by the ribcage).
Camera angle/pose: Anterior-lateral view with a "peel-back" of the ribcage to reveal the muscle's true position.
Highlighted structures: Subscapularis in teal/blue; ribcage and scapula in neutral grey, ribcage shown semi-transparent.
Labels needed: "Subscapularis," "Scapula (front surface)," "Lesser tubercle (attachment)."
Mood/purpose: This muscle is hard to visualize since it's hidden against the ribcage — the illustration should make its hidden position intuitive.

Subscapularis — Highlighted Anatomy Diagram

Subject: Isolated subscapularis muscle, shown alone with a faint scapula outline.
Camera angle/pose: Anterior three-quarter view, muscle floating in neutral space.
Highlighted structures: Full muscle in teal/blue.
Labels needed: "Origin (front of scapula)," "Insertion (lesser tubercle)."
Mood/purpose: Clarify the muscle's broad, fan-like shape.

Subscapularis — Cross-Sectional Diagram

Subject: Cross-section through the shoulder showing subscapularis sandwiched between the scapula and ribcage.
Camera angle/pose: Transverse slice through the upper chest and shoulder blade.
Highlighted structures: Subscapularis in teal/blue; ribcage and scapula in neutral grey.
Labels needed: "Subscapularis," "Ribcage," "Scapula."
Mood/purpose: Reinforce this muscle's unique hidden anatomical position.

Subscapularis — Suggested 3D Model Highlights

Isolate with teal glow; animate internal rotation movement, pairing with the internal rotation with band exercise page.

Other Key Muscles

Deltoid — Hero Anatomy Illustration

Subject: Full shoulder, lateral (side) view, showing the deltoid's three sections capping the shoulder.
Camera angle/pose: Direct lateral view, arm relaxed at side, camera at shoulder height.
Highlighted structures: Deltoid muscle in teal/blue, with the three sections (anterior, middle/lateral, posterior) subtly differentiated by shade; underlying rotator cuff shown as faint grey outline beneath.
Labels needed: "Deltoid," "Anterior deltoid," "Middle (lateral) deltoid," "Posterior deltoid."
Mood/purpose: Show the deltoid's role as the visible "cap" of the shoulder, distinct from the rotator cuff underneath.

Deltoid — Highlighted Anatomy Diagram

Subject: Isolated deltoid muscle with all three sections visible, shown from a front-lateral three-quarter angle.
Camera angle/pose: Anterior-lateral three-quarter view, muscle floating in neutral space.
Highlighted structures: Full deltoid in teal/blue with section boundaries marked by subtle line work.
Labels needed: "Anterior deltoid," "Middle deltoid," "Posterior deltoid," "Insertion (deltoid tuberosity)."
Mood/purpose: Clarify how the three sections work together but can be trained somewhat independently.

Deltoid — Cross-Sectional Diagram

Subject: Cross-section through the shoulder showing the deltoid layered over the rotator cuff.
Camera angle/pose: Coronal slice through the shoulder.
Highlighted structures: Deltoid in teal/blue (outer layer); rotator cuff muscles in a lighter accent beneath.
Labels needed: "Deltoid," "Rotator cuff (deeper layer)."
Mood/purpose: Visually distinguish the deltoid (surface, larger, more visible) from the rotator cuff (deep, smaller, stabilizing).

Deltoid — Suggested 3D Model Highlights

Allow independent highlighting of each of the three deltoid sections; animate arm abduction to show the middle deltoid as the primary mover.

Biceps Brachii (Long Head) — Hero Anatomy Illustration

Subject: Front of the upper arm and shoulder, showing the long head of the biceps tendon traveling up into the shoulder joint.
Camera angle/pose: Anterior view, arm relaxed at side.
Highlighted structures: Biceps muscle and long head tendon in teal/blue; shoulder and humerus in neutral grey.
Labels needed: "Biceps brachii," "Long head tendon," "Bicipital groove."
Mood/purpose: Clarify that the biceps isn't just an arm muscle — its tendon reaches into the shoulder joint itself.

Biceps Brachii (Long Head) — Highlighted Anatomy Diagram

Subject: Isolated biceps long head tendon, tracing its path from inside the joint down through the bicipital groove to the muscle belly.
Camera angle/pose: Anterior three-quarter view, tendon floating with faint bone outline.
Highlighted structures: Tendon path in teal/blue, muscle belly in a lighter accent tone.
Labels needed: "Origin (inside joint, at labrum)," "Bicipital groove," "Muscle belly."
Mood/purpose: Support the biceps tendinopathy injury page by showing exactly where irritation commonly occurs.

Biceps Brachii (Long Head) — Cross-Sectional Diagram

Subject: Cross-section through the bicipital groove, showing the tendon sitting in its bony channel.
Camera angle/pose: Transverse slice through the front of the shoulder.
Highlighted structures: Tendon in teal/blue; groove walls in neutral grey.
Labels needed: "Long head tendon," "Bicipital groove," "Transverse humeral ligament."
Mood/purpose: Explain why this tendon can become irritated as it moves through a narrow channel.

Biceps Brachii (Long Head) — Suggested 3D Model Highlights

Isolate the tendon path with teal glow; animate its gliding motion within the groove during elbow and shoulder movement.

Trapezius — Hero Anatomy Illustration

Subject: Full upper back and neck, posterior view, showing the trapezius's broad, kite-like shape spanning from the skull to the mid-back.
Camera angle/pose: Direct posterior view, torso upright.
Highlighted structures: Trapezius in teal/blue, with upper, middle, and lower sections subtly differentiated by shade; scapula and spine in neutral grey.
Labels needed: "Trapezius," "Upper trapezius," "Middle trapezius," "Lower trapezius."
Mood/purpose: Show the trapezius's major role in shoulder blade positioning and posture, connecting it to prevention and ergonomics content.

Trapezius — Highlighted Anatomy Diagram

Subject: Isolated trapezius muscle, shown alone with a faint outline of the spine and scapula.
Camera angle/pose: Posterior view, muscle floating in neutral space.
Highlighted structures: Full muscle in teal/blue with section boundaries marked.
Labels needed: "Upper fibers," "Middle fibers," "Lower fibers," "Attachment to scapular spine."
Mood/purpose: Clarify how different sections of this one muscle perform different jobs (elevating vs. retracting the shoulder blade).

Trapezius — Cross-Sectional Diagram

Subject: Cross-section through the upper back showing the trapezius as the most superficial muscle layer.
Camera angle/pose: Transverse slice through the upper back.
Highlighted structures: Trapezius in teal/blue (surface layer); deeper back muscles in neutral grey.
Labels needed: "Trapezius," "Deeper back muscles."
Mood/purpose: Reinforce the trapezius's position as the muscle readers can feel most easily when tension builds up.

Trapezius — Suggested 3D Model Highlights

Allow independent highlighting of upper/middle/lower fibers; animate shoulder blade elevation, retraction, and depression to show which fibers drive each motion.

Ligaments and Bursa

Shoulder Ligaments (Glenohumeral, Coracoacromial, Coracoclavicular) — Hero Anatomy Illustration

Subject: Front view of the shoulder joint with the joint capsule made semi-transparent to reveal the ligaments beneath.
Camera angle/pose: Anterior three-quarter view, arm relaxed at side.
Highlighted structures: All shoulder ligaments in teal/blue; joint capsule shown as a faint grey semi-transparent layer; bones in neutral grey.
Labels needed: "Glenohumeral ligaments," "Coracoacromial ligament," "Coracoclavicular ligaments," "Coracoid process."
Mood/purpose: Give readers a single reference image tying together several ligaments mentioned across different injury pages.

Shoulder Ligaments — Highlighted Anatomy Diagram

Subject: Close-up of the ligaments alone, shown as distinct bands without surrounding muscle.
Camera angle/pose: Anterior close-up view.
Highlighted structures: Each ligament group in a slightly different shade of teal/blue for differentiation.
Labels needed: "Superior, middle, and inferior glenohumeral ligaments," "Coracoacromial ligament," "Coracoclavicular ligament (conoid and trapezoid parts)."
Mood/purpose: Support detailed learning for readers who want to understand each ligament's specific role in joint stability.

Shoulder Ligaments — Cross-Sectional Diagram

Subject: Cross-section through the joint showing how the ligaments blend into the joint capsule.
Camera angle/pose: Coronal slice.
Highlighted structures: Ligament fibers in teal/blue; capsule in a lighter grey-teal blend.
Labels needed: "Ligament fibers," "Joint capsule."
Mood/purpose: Clarify that ligaments aren't separate structures floating free, but thickened parts of the capsule itself.

Shoulder Ligaments — Suggested 3D Model Highlights

Allow toggling of each named ligament individually; animate joint stress (e.g., excessive external rotation) to show which ligament resists which motion.

Subacromial Bursa — Hero Anatomy Illustration

Subject: Top of the shoulder joint, showing the subacromial bursa nestled between the acromion and the rotator cuff tendons.
Camera angle/pose: Anterior-superior three-quarter view, cutaway to reveal the bursa's position.
Highlighted structures: Bursa in teal/blue; acromion and supraspinatus tendon in neutral grey.
Labels needed: "Subacromial bursa," "Acromion," "Supraspinatus tendon."
Mood/purpose: Directly support the subacromial bursitis injury page by making this small structure's location unmistakable.

Subacromial Bursa — Highlighted Anatomy Diagram

Subject: Isolated bursa shown as a flattened, fluid-filled sac, with faint outlines of the acromion above and tendon below.
Camera angle/pose: Sagittal (side) view, close-up.
Highlighted structures: Bursa in teal/blue, with a subtle glossy texture suggesting fluid content.
Labels needed: "Subacromial bursa," "Bursal fluid."
Mood/purpose: Help readers understand what a bursa physically is, since the term is unfamiliar to many.

Subacromial Bursa — Cross-Sectional Diagram

Subject: Cross-section through the subacromial space, showing the bursa's thin, flattened shape between bone and tendon.
Camera angle/pose: Coronal slice through the top of the shoulder.
Highlighted structures: Bursa in teal/blue; acromion above and tendon below in neutral grey.
Labels needed: "Subacromial bursa," "Acromion," "Supraspinatus tendon," "Subacromial space."
Mood/purpose: This is the key diagram for illustrating bursitis — should convey how little room the bursa has when inflamed and swollen.

Subacromial Bursa — Suggested 3D Model Highlights

Isolate with teal glow; animate a "swelling" state (bursa shown enlarged) versus normal state, to illustrate bursitis for the injury module.

Nerves

Suprascapular Nerve — Hero Anatomy Illustration

Subject: Posterior view of the shoulder blade, showing the suprascapular nerve traveling through a notch in the scapula to reach the supraspinatus and infraspinatus.
Camera angle/pose: Posterior-superior three-quarter view, muscles shown semi-transparent to reveal the nerve path.
Highlighted structures: Suprascapular nerve in teal/blue; scapula and rotator cuff muscles in neutral grey, semi-transparent.
Labels needed: "Suprascapular nerve," "Suprascapular notch," "Supraspinatus," "Infraspinatus."
Mood/purpose: Show the nerve's vulnerable path through a narrow bony notch, relevant to nerve-related shoulder weakness.

Suprascapular Nerve — Highlighted Anatomy Diagram

Subject: Isolated nerve path, shown as a single highlighted line from its origin at the brachial plexus to its endpoints at the two rotator cuff muscles it supplies.
Camera angle/pose: Posterior view, nerve path floating with faint scapula outline.
Labels needed: "Origin (brachial plexus)," "Suprascapular notch," "Branch to supraspinatus," "Branch to infraspinatus."
Highlighted structures: Nerve path in teal/blue, rendered as a smooth glowing line.
Mood/purpose: Simplify a complex nerve path into an easy-to-follow visual line, appropriate for a general audience.

Suprascapular Nerve — Cross-Sectional Diagram

Subject: Cross-section through the suprascapular notch, showing the nerve passing beneath the transverse scapular ligament.
Camera angle/pose: Close-up transverse slice.
Highlighted structures: Nerve in teal/blue; ligament and bone in neutral grey.
Labels needed: "Suprascapular nerve," "Transverse scapular ligament," "Suprascapular notch."
Mood/purpose: Support advanced readers curious about why this nerve can become compressed at this specific point.

Suprascapular Nerve — Suggested 3D Model Highlights

Isolate nerve path with a soft pulsing teal glow to suggest nerve conduction; allow users to trace the path interactively from the neck to the shoulder blade.

Axillary Nerve — Hero Anatomy Illustration

Subject: Posterior-lateral view of the shoulder, showing the axillary nerve wrapping around the surgical neck of the humerus beneath the deltoid.
Camera angle/pose: Posterior-lateral three-quarter view, deltoid shown semi-transparent.
Highlighted structures: Axillary nerve in teal/blue; humerus and deltoid in neutral grey, semi-transparent.
Labels needed: "Axillary nerve," "Surgical neck of humerus," "Deltoid."
Mood/purpose: Show why this nerve is at risk during shoulder dislocations, given its close wrap around the bone.

Axillary Nerve — Highlighted Anatomy Diagram

Subject: Isolated nerve path from the brachial plexus, around the humerus, to the deltoid and teres minor.
Camera angle/pose: Posterior-lateral view, nerve path floating with faint bone outline.
Highlighted structures: Nerve path in teal/blue.
Labels needed: "Origin (brachial plexus)," "Path around humeral neck," "Branch to deltoid," "Branch to teres minor."
Mood/purpose: Simplify the nerve's path for general audiences learning why numbness can follow a dislocation.

Axillary Nerve — Cross-Sectional Diagram

Subject: Cross-section through the region just below the shoulder joint, showing the nerve's proximity to the bone.
Camera angle/pose: Transverse slice at the level of the surgical neck.
Highlighted structures: Nerve in teal/blue; bone in neutral grey.
Labels needed: "Axillary nerve," "Surgical neck of humerus."
Mood/purpose: Support the dislocation injury page's explanation of nerve-related red-flag symptoms.

Axillary Nerve — Suggested 3D Model Highlights

Isolate nerve path with pulsing teal glow; show a simplified "at-risk zone" overlay near the surgical neck for injury-education context.

Brachial Plexus (Shoulder Region Overview) — Hero Anatomy Illustration

Subject: Neck and shoulder region, showing the brachial plexus as a network of nerves emerging from the neck and branching toward the shoulder and arm.
Camera angle/pose: Anterior-lateral three-quarter view, neck and shoulder muscles shown semi-transparent.
Highlighted structures: Brachial plexus network in teal/blue; neck and shoulder muscles in neutral grey, semi-transparent.
Labels needed: "Brachial plexus," "Roots," "Trunks," "Cords," "Suprascapular nerve," "Axillary nerve."
Mood/purpose: Give a simplified "map" overview, since the full brachial plexus is complex — focus on clarity over completeness.

Brachial Plexus — Highlighted Anatomy Diagram

Subject: Simplified schematic of the plexus, showing it more like a labeled flow diagram than strict anatomy, overlaid on a faint body outline.
Camera angle/pose: Flat, diagram-style front view.
Highlighted structures: Nerve branches in teal/blue lines of varying thickness.
Labels needed: "Roots (C5-C8, T1)," "Trunks," "Cords," "Major branches to the shoulder."
Mood/purpose: Prioritize comprehension over anatomical precision — this is the most complex structure in the module and benefits from a simplified, diagrammatic treatment.

Brachial Plexus — Cross-Sectional Diagram

Subject: Cross-section through the base of the neck, showing the plexus emerging between two neck muscles.
Camera angle/pose: Transverse slice at the base of the neck.
Highlighted structures: Plexus in teal/blue; surrounding muscles in neutral grey.
Labels needed: "Brachial plexus," "Scalene muscles (surrounding structures)."
Mood/purpose: Support advanced readers researching referred pain or nerve compression topics.

Brachial Plexus — Suggested 3D Model Highlights

Allow users to isolate the full plexus or trace individual named nerves (suprascapular, axillary) branching from it; use a soft pulsing glow to suggest nerve signal flow.

References

Cleveland Clinic. "What Is the Anatomy of the Rotator Cuff?" https://my.clevelandclinic.org/health/body/rotator-cuff
StatPearls (NCBI Bookshelf). "Anatomy, Rotator Cuff." https://www.ncbi.nlm.nih.gov/books/NBK441844/
StatPearls (NCBI Bookshelf). "Anatomy, Shoulder and Upper Limb, Glenohumeral Joint." https://www.ncbi.nlm.nih.gov/books/NBK537018/
StatPearls (NCBI Bookshelf). "Anatomy, Shoulder and Upper Limb, Deltoid Muscle." https://www.ncbi.nlm.nih.gov/books/NBK537055/
StatPearls (NCBI Bookshelf). "Anatomy, Shoulder and Upper Limb, Biceps Muscle." https://www.ncbi.nlm.nih.gov/books/NBK519538/
StatPearls (NCBI Bookshelf). "Anatomy, Back, Trapezius." https://www.ncbi.nlm.nih.gov/books/NBK518994/
StatPearls (NCBI Bookshelf). "Anatomy, Shoulder and Upper Limb, Axillary Nerve." https://www.ncbi.nlm.nih.gov/books/NBK493212/
StatPearls (NCBI Bookshelf). "Anatomy, Shoulder and Upper Limb, Suprascapular Nerve." https://www.ncbi.nlm.nih.gov/books/NBK557880/
Kenhub. "Ligaments of the shoulder joint." https://www.kenhub.com/en/library/anatomy/ligaments-of-the-shoulder-joint
Physiopedia. "Subacromial Bursa." https://www.physio-pedia.com/Subacromial_Bursa
Cleveland Clinic. "Brachial Plexus." https://my.clevelandclinic.org/health/body/24350-brachial-plexus

Anatomy Illustration Briefs — Shoulder