shoulder/elbow

O -Inferior angle of the crest of the spine of the scapula, lateral margin of acromion, anterior border of lateral one-third of clavicle

I -Deltoid tuberosity of humerus

In -Axillary nerve [C5,C6]

F -Major abductor of arm (abducts arm beyond initial 15* done by supraspinatus); clavicular fibers assist in flexing the arm; posterior fibers assist in extending the arm

O -Elongate oval area on the posterior surface of the inferior angle of the scapula

I -Medial lip of the intertubercular sulcus on the anterior surface of the humerus

In -Lower (inferior) subscapular nerve [C5,C6.C7]

F -Medial rotation, adduction, and extension of the arm at the glenohumeral joint

O -Supraspinatus Fossa

I -Most superior facet on the greater tubercle of the humerus

In -Suprascapular nerve [C5,C6]

F -Rotator cuff muscle; initiation of abduction of arm to 15* at glenohumeral joint

O -Infraspinatus Fossa

I -Middle facet on posterior surface of the greater tubercle of the humerus

In -Suprascapular nerve [C5,C6]

F -Rotator cuff muscle; lateral rotation of arm at the glenohumeral joint

O -Middle part of lateral border of scapula

I -Inferior facet on the posterior surface of the greater tubercle of the humerus

In -Axillary nerve [C5,C6]

F -Rotator cuff muscle; lateral rotation of arm at the glenohumeral joint

O -Subscapular fossa

I -Lesser tubercle of humerus

In -Upper & lower subscapular nerves [C5,C6,C7]

F -Rotator cuff muscle; medial rotation of the arm at glenohumeral joint

O -Long head-supraglenoid tubercle of scapula; short head-apex of coracoid process

I -Radial tuberosity

In -Musculocutaneous nerve [C5,C6]

F -Powerful flexor of the forearm at the elbow joint and supinator of the forearm; accessory flexor of the arm at glenohumeral joint

O -Long head-infraglenoid tubercle of scapula; medial & lateral heads-posterior surface of humerus

I -Olecranon

In -Radial nerve [C6,C7,C8]

F -Extension of the forearm at elbow joint. Long head can also extend & adduct the arm at glenohumeral joint

O -Apex of coracoid process

I -Linear roughening on midshaft of humerus on medial side

In - Musculocutaneous nerve [C5,C6,C7]

F -Flexor of the arm at glenohumeral joint

O -Anterior aspect of humerus (medial & lateral surfaces) & adjacent intermuscular septae

I -Tuberosity of ulna

In - Musculocutaneous nerve [C5,C6]; (small contribution by radial nerve [C7] to lateral part of muscle)

F -Powerful flexor of the forearm at elbow joint

O -Proximal part of lateral supraepicondylar ridge of humerus & adjacent intermuscular septum

I -Lateral surface of distal end of radius

In -Radial nerve [C5,C6] before division into superficial & deep branches

F -Accessory flexor of elbow joint when forearm is midpronated