Quadrangular and triangular spaces Flashcards
What are these?
Passageways between muscles of shoulder
Quadrangular space importance
Route for axillary nerve and posterior circumflex humeral artery
Quadrangular space borders
Superior: Teres minor
Lateral: Surgical neck of humerus
Inferior: Teres major
Medial: Long head triceps brachii
Triangular space importance
Circumflex scapular vessels enter infraspinous fossa
NO NERVES
Triangular space borders
Lateral: Long head triceps brachii
Superior: Teres minor
Inferior: Teres major
Triangular interval importance
Most inferior
Radial nerve and profunda brachii artery are visible in base as they wind around humerus in radial (spiral) groove
Triangular interval borders
Lateral: Humeral shaft/lateral head of tricep brachii
Medial: Long head of tricep brachii
Superior: Teres major
Bursae around shoulder
Subscapular
Subacromial
Subacromial bursa
Separates supraspinatus tendon from overlying coracoacromial ligament
Subscapular bursa
Between tendon of subscapularis and chest wall
Subacromial space importance
Between coracoacromial arch ligament and head of humerus
During abduction potential for impingement of soft tissues = inflammation and irritation
Contents subacromial space
Subacromial bursa
Supraspinatus tendon
Joint capsule
Long head of biceps
