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Cranial Muscles of the Arm
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Biceps brachii
Brachialis
name the cranial muscles of the arm (2)
Biceps brachii
long, fusiform muscle that arises from the supraglenoid tubercle of the scapula and runs through the intertubercular groove of humerus and inserts on the medial tuberosity of the proximal end of radius and on the adjacent part of ulna.
Origin: supraglenoid tubercle
Insertion: ulnar and radial tuberosities
Action: to flex the shoulder joint
Innervation: Musculocutaneus nerve
Brachialis
long, thin muscle that arises from the proximocaudal part of the humerus and winds laterally in the brachialis groove of humerus
Origin: lateral surface of the humerus
Insertion: ulnar and radial tuberosities
Action: to flex the elbow
Innervation: Musculocutaneus nerve
TRUE
TRUE OR FALSE: the cranial muscles of the arm are the flexors of the elbow joint