biceps brachii

biceps bra·chi·i (brk-, -k-, brk-, --)

n.

A muscle whose long head has origin from the supraglenoidal tuberosity of the scapula and whose short head has origin from the coracoid process, with insertion into the tuberosity of the radius, with nerve supply from the musculocutaneous nerve, and whose action flexes and supinates the forearm.

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biceps brachii

[bī′seps brā′kē·ī]

Etymology: L, bis, twice, caput, head, bracchii, arm

the long fusiform muscle of the upper arm on the anterior surface of the humerus, arising in two heads from the scapula. It flexes the arm and the forearm and supinates the hand. Also called biceps, biceps flexor cubiti. Compare brachialis, triceps brachii.

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biceps

a muscle having two heads. There is a biceps muscle in both fore- and hindlimbs. See Table 13. See also bicipital.

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biceps brachii

is a large fusiform muscle lying on the cranial surface of the humerus. Its function is to flex the elbow and integrate the actions of the shoulder and elbow. A medial displacement of the tendon of origin has been reported in dogs, causing a weight-bearing lameness.

biceps femoris

a large muscle of the caudolateral part of the thigh. Its function is to extend the hindlimb when propelling the body, during rearing or kicking. All of the joints are affected except those of the digit.

Rupture of the muscle causes acute hindlimb lameness in cattle. Resembles an intermittent upward fixation of the patella, with extension of the stifle and hock.

biceps reflex

is elicited in dogs by striking a finger placed on the biceps tendon on the craniomedial aspect of the elbow. An active reflex indicates intact spinal cord segments and nerve roots C6-8 and musculocutaneous nerve. It becomes exaggerated in disease of the upper motor neuron.

biceps tendon ossification

causes lameness in the horse. Is radiographically apparent.