NAME ORIGIN INSERTION ACTION NERVE
Biceps brachii long head (65-1): tuber- by common tendon to • flexes elbor joint & supinates Musculocutane-
cle above glenoid cav- radial tuberosity forearm (usually at the same ous nerve
ity and lip of glenoid time)
cavity of scapula • weak flexor of arm @ shoulder
short head: (65-2): cora-
coid process of scapula
Brachialis front of distal humerus coronoid process of • major forearm flexor, synergist Musculocutane-
ulna with biceps brachii ous nerve
Brachioradialis lateral supracondylar base of styloid pro- • synergist in forearm flexion, best Radial nerve
ridge @ distal end of cess of radius when forearm is partially flexed
humerus • stablizes the elbow during rapid
FOREARM MOVERS
flexion & extension
Triceps brachii lateral head (68-1): pos- by common tendon • agonist of forearm extension Radial nerve
terior shaft of humerus into olacrenon pro- (medial head)
long head (68-2) : cess of ulna • antagonist of forearm flexors
infraglenoid tubercle • stablizes shoulder joint & assist in
of scapula arm adduction (long head tendon)
medial head (68-3):
posterior humeral shaft
distal to radial groove
Anconeus lateral epicondyle of lateral aspect of ola- • abducts ulna during forearm Radial nerve
humerus cranon process pronation
• synergist of triceps brachii in
elbow extension
Pronator teres medial epicondyle of hu- by common tendon • pronates forearm Median nerve
FOREARM ROTATORS
merus, coronoid process into lateral radius, • weak flexor of elbow
of ulna midshaft
Supinator lateral epicondyle of hu- lateral, anterior & • forcibly supinates forearm with Posterior inter-
merus, radial collateral posterior surfaces of biceps brachii osseous nerve
& annular ligaments, proximal 1/3 of radius • weakly supinates forearm work-
supinator fossa & crest ing along
of ulna • antagonist of Pronator teres
