Anatomical spaces of the upper limb

Subacromial space contents

subacromial bursa, long head of biceps tendon, the supraspinatus tendon

Borders of the subacromial space

Roof: coracacromial arch

, Floor: superior aspect of humeral head

lateral: the supraspinatus tendon

Medial: the coracoacromial ligament

Rotator interval contents

Superior GH, the coracohumeral ligament and the long head of biceps tendon

Rotator interval borders

Superior: the supraspinatus tendon

Inferior: the subscapularis tendon

Medial: coracoid process

Lateral: transverse humeral ligament

Quadrangular space contents

Axillary nerve and posterior humeral circumflex artery

Quadrangular space borders

Superior: teres minor
Inferior: teres major
Medial: long head of triceps
Lateral: surgical neck of humerus

Triangular space contents

Subscapular artery and circumflex scapular artery + the radial nerve

Triangular space borders

Superior: teres minor
Inferior: teres major
Medial: long head of triceps
Lateral: surgical neck of humerus

Cubital fossa contents

Median nerve, brachial artery, biceps brachii tendon, radial nerve

Cubital fossa boundaries

Lateral: brachioradialis

Medial: pronator teres

Superior: the intercondylar line

Cubital tunnel contents

Ulnar nerve, medial epicondyle

Cubital tunnel borders

lateral: the medial epicondyle

medial: the olecranon

roof: osbornes ligament

floor: the elbow joint capsule

Carpel tunnel contents

Median nerve, flexor tendons

Carpel tunnel borders

Lateral: scaphoid and trapezium bones
Medial: pisiform and hamate bones

Guyons canal contents

Ulnar nerve, ulnar artery, and accompanying veins

Guyuns tunnel borders

Medial: pisiform bone
Lateral: hook of the hamate bone

Superior: Palmar carpel ligament

Inferior: flexor retinaculum