. Chordate morphology. Morphology (Animals); Chordata. pars ciavobrachialis^ pectoralis major pars pectoantibrochialis anterior pars pectoantibrochialis posterior pars pectoantibrochialis anterior pars pectoantibrachiolis poster. biceps brach Figure 14-6. Ventral musculature of the shoulder and upper arm of the cat. A, ventral superficial layer; B, deeper layers reveoled by reflexing a port of the superficial layer; C, muscles of the inner aspect of the scapula. brachioradialis; it arises from the humerus and inserts on the radius and ulna. The brachioradiaUs is but a part of the brachialis, w
. Chordate morphology. Morphology (Animals); Chordata. pars ciavobrachialis^ pectoralis major pars pectoantibrochialis anterior pars pectoantibrochialis posterior pars pectoantibrochialis anterior pars pectoantibrachiolis poster. biceps brach Figure 14-6. Ventral musculature of the shoulder and upper arm of the cat. A, ventral superficial layer; B, deeper layers reveoled by reflexing a port of the superficial layer; C, muscles of the inner aspect of the scapula. brachioradialis; it arises from the humerus and inserts on the radius and ulna. The brachioradiaUs is but a part of the brachialis, which arises from the belly of that muscle and extends as a narrow band out along the nerves and blood vessels going to the hand. Behind the brachialis is the triceps, two heads of which can ben seen. The pars lateralis and the pars longum are both large bellies which taper to a broad common insertion over the olecranon process of the ulna. Their origins are from the head of the humerus and the lower margin of the scapula respectively. If the lateral head of the triceps is bisected and the ends reflexed, the medial head and the pars anconeus are seen. Both of these arise along the humerus. On the ventral aspect is a muscle similar to the pars anconeus, this is the epitrochleo-anconeus. On the ventral aspect of the upper arm, with the pars pectoantibrachialis raised or reflexed, is the biceps brachii, as distinguished from the biceps femoris of the thigh. The biceps arises from the anterior aspect of the base of the coracoid process of the scapula by a long tendon and inserts through a tapered tendon on the radius and ulna (along 426 THE MUSCULAR SYSTEM. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jollie, Malcolm. New York, Reinhold
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