A & P 1 Lab # 4 (muscle Origin, Insertion and Action)

Origin: sternal end of clavicle, sternum ........Insertion: intertubercular sulcus and greater tubercle of humerus ......action: adducts and medially rotates arm

origin: sternum and clavicle ....... insertion: mastoid process of temporal bone ......action: flexes and laterally rotates the head

origin: occipital bone, spinous processes of C₇ , all thoracic vertebrae ....... insertion: scapula and clavicle........ action: stabilizes, elevates, retracts and rotates scapula

origin: lower six thoracic vertebrae, lumbar vertebrae, lower 3-4 ribs, iliac crest, scapula's inferior angle .........insertion: intertubercular sulcus of humerus .......... action: prime mover of arm extension, powerful arm adductor; medially rotates arm at shoulder

origin: rib cage, sternum, costal cartilages of last six ribs and lumbar vertebrae....... insertion: central tendon: ....... action: prime mover of inspiration; flattens on contraction

origin: coracoid process, supraglenoid tubercle........... insertion: radial tuberosity .... action: flexes and supinates forearm

origin: zygomatic arch and zygomatic bone ........ insertion: angle and ramus of mandible ........ action : prime mover of jaw closure

origin: scapula, humerus, distal to radial groove ...... insertion: olecranon of ulna ....action: powerful forearm extensor

origin: subscapular fossa of scapula ....... insertion: lesser tubercle of humerus ....... action: chief medical rotator of arm

origin: front of distal humerus ........ insertion: coronoid process of ulna .... action: a major forearm flexor

origin: medial epicondyle of humerus ....... insertion: base of 2nd and 3rd metacarpals ........ action: powerful flexor and abductor of hand

origin: lateral epicondyle of humerus, posterior border of ulna ...... insertion: base of fifth metacarpal ........ action: extends hand and adducts hand

origin: lateral supracondylar ridge of humerus...... insertion: base of second metacarpal .... action: extends and abducts hand

origin: anterior superior iliac spine ....... insertion: medial aspect of proximal tibia ....... action: flexes, abducts, and laterally rotates thigh

origin: ischial and pubic rami and ischial tuberosity ....insertion: adductor tubercle of femur ..... action: adducts and medially rotates and flexes thigh