Muscles of the Upper Limb Flashcards
(12 cards)
Deltoid
O: lateral third of clavicle, acromion, and spine of scapula
I: Deltoid tuberosity of humerus
A: Prime mover of arm abduction
N: Axillary Nerve
Biceps Brachii
O: Short head: coracoid process. Long head: supraglenoid tubercle
I: radial tuberosity
A: Flexes elbow joint and supinates forearm
N: Musculocutaneous Nerve
Brachialis
O: front of distal humerus
I: coronoid process of ulna
A: major forearm flexor
N: Musculocutaneous Nerve
Triceps Brachii
O: long head: tubercle of scapula. Lateral Head: post. shaft of humerus.
I: olecranon of ulna
A: powerful arm extensor
N: Radial Nerve
Brachioradialis
O: humerus
I: base of radial styloid process
A: synergist in flexing forearm
N: Radial Nerve
Extensor Digitorum
O: humerus
I: distal phalanges digits 2-5
A: Prime mover of finger extension
N: posterior interosseous nerve
Extensor Carpi Radialis Longus
O: humerus
I: base of 2nd metacarpal
A: Extends and abducts wrist
N: Deep radial nerve
Extensor Carpi Radialis Brevis
O: humerus
I: base of 3rd metacarpal
A: Extends and abducts wrist
N: deep radial nerve
Extensor Carpi Ulnaris
O:lateral epicondyle of humerus, posterior border of ulna
I: base of 5th metacarpal
A: Extends and adducts wrist
N: Posterior interosseous nerve
Flexor Digitorum Superficialis
O: medial epicondyle of humerus, coronoid process of ulna, shaft of radius
I: middle phalanges of fingers 2-5
A: flexes wrist and middle phalanges of fingers 2-5
N: Median Nerve
Flexor Carpi Radialis
O: medial epicondyle of humerus
I: base of 2nd and 3rd metacarpals
A: powerful flexor of wrist, abducts hand
N: Median Nerve
Flexor Carpi Ulnaris
O: medial epicondyle of humerus, olecranon and posterior surface of ulna
I: pisiform and hamate bones, base of 5th metacarpal
A: powerful flexor of wrist, adducts hand
