The Shoulder Flashcards
Ligaments holding the humerus up
corachohumeral ligament
transverse humeral ligament
deltoid
3 heads:
Proximal:
1. lateral1/3 of clavicle
2. acromion
3. scapula spine
distal: deltoid tuberosity of humerus
A: strong ABD, FL, EXT
Function: resist downard weight of arm
NS: axillary nerve
rotator cuff muscles
subscapularis - internal
teres minor - ext
infraspinatus - ext
supraspinatus - abd
Supraspinatus
P: supraspinous fossa
D: greater tubercle of humerus(sup)
A: initiates and assists ABD in GHJ
F: stabilise head of humerus in glenoid joint
NS: suprascapular nerve
Infraspinatus
P: infraspinous fossa
D: greater tubercle of humerus (middle)
A: ext rot. of ghj
F: stabilise head of humerus in glenoid joint
NS: suprascapular nerve
teres minor
P: middle part of lateral border of scapular
D: greater tubercle of humerus (inf)
A: ext. rot. of GHJ
F: stabilise head of humerus in glenoid joint
NS: axillary nerve
Subscapularis
P:subscapular fossa
D: lesser tubercle of humerus
A: med rot of ghj
F: stabilise head of humerus in glenoid joint
NS: upper and lower subscapular nerve
teres major
P: posterior surface of inferior angle of scapular
D: medial lip intertubercular sulcus of humerus
A: ADD + med rot of ghj
F: stabilise head of humerus in glenoid joint
NS: lower subscapular nerve
Biceps brachii
P:
Long: supraglenoid tubercle of scapula
Short: coracoid process of scapula
D: radial tuberosity
A: forearm supination and elbow flexion, shoulder flexion
NS: musculocutaneous nerve
Coracobrachialis
P: coracoid process of scapula
D: medial surface of humerus
A: shoulder flexion and adduction
NS: musculocutaneous nerve
Brachialis
P: anterior surface of distal humerus
D: coronoid process and ulnar tuberosity
A: elbow flexion
NS: musculocutaneous and radial nerve
