M:

O: inferior lateral border of scapula

I: greater tubercle

A: rotates arm laterally; extends and adducts arm

M:

O: subscapular fossa of scapula

I: lesser tubercle

A: rotates arm medially

M:

O: supraspinous fossa of scapula

I: greater tubercle

A: abducting arm

M:

O: infraspinous fossa of scapula

I: greater tubercle

A: rotates arm laterally; adducts arm

M:

A: flexes forearm

M:

A: flexes forearm

M:

O: long head: supraglenoid tubercle; short head: coracoid process

I: radial tuberosity

A: flexes forearm; supinates

M:

O: long head: inferior to glenoid cavity; medial and lateral head: humerus

I: olecranon of ulna

A: extension of forearm

M:

O: pubic crest and pubic symphysis

I: costal cartilages (ribs 5-7), xiphoid process

A: Compression and flexion abdominal area

M:

A: Compression and flexion abdominal area

M:

A: Compression and flexion abdominal area

M:

A: Compression and flexion abdominal area

M: Extensor carpi radialis longus

M:

A: extends phalanges

M:

A: weak flexor of wrist (sometimes absent)