Muscle 2 OIA Flashcards
masseter
o: zygomatic arch and maxilla
i: coronoid process and ramus of mandible
a: elevates and protracts mandible
sternocleidomastoid
o: sternum and clavicle
i: mastoid process
a: rotates head flexes neck
trapezius
o: external occipital protuberance; superior nuchal line, spinous processes of C7-T12
i: clavicle, acromion process, spine of scapula
a: rotates retracts elevates and depresses scapula extend neck
Deltoid
o: clavicle acromion process and spine of scapula
i: deltoid tuberosity
a: flexes extends and abducts shoulder joint
biceps brachii
o: supraglenoid tubercle and coracoid process
i: radial tuberosity
a: extends elbow and shoulder
triceps brachii
o: infraglenoid tubercle and posterior shaft of humerus
i: olecranon process
a: extends elbow and shoulder
extensor digitorum
o: lateral epicondyle of humerus
i: digits 2-5
a: extends digits 2-5
flexor digitorum superficialis
o: medial epicondyle of the humerus
i: digits 2-5
a: flexes digits 2-5
opponens pollicis
o: trapezium
i: 1st metacarpal
a: opposition of the thumb
brachial plexus
upper limb
musculocutaneous nerve
anterior upper arm
median nerve
anterior forearm and thenar region
ulnar nerve
hand, except thenar region
radial nerve
posterior upper arm and posterior forearm
axillary nerve
shoulder (deltoid and teres minor)
