The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds (1890) (14752149995)

Identifier: myologyofravencoc00shuf (find matches)
Title: The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds
Year: 1890 (1890s)
Authors: Shufeldt, Robert W. (Robert Wilson), 1850-1934
Subjects: Ravens -- Anatomy Birds -- Anatomy Muscles
Publisher: London, New York, Macmillan and co.
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library



Text Appearing Before Image:
ent, and the external head running intothe pneumatic fossa. Between the limbs of the mus-cular bifurcation thus formed arises the supraspinatusmuscle. The external head of the triceps in this localityalso of itself bifurcates in order to allow the teres etinfraspinatus muscle to attach itself to the humeralshaft (Fig. 27). The internal and external heads of the triceps becomeblended in their attachment down the anconal aspect ofthe bone to a point below the insertion of the deltoid.Here they form a flat tendon, partly muscular, which isquite broad, and that passes over the elbow-joint to THE MUSCLES OF THE UPPER EXTREMITY. 121 insert itself into the entire under surface of the ole-cranon process of the ulna. The triceps is the great extensor of the antibrachium,and direct antao-onist of the hrachialis anticus andbiceps. Its scapula or long head also materially pro-tects that part of the shoulder-joint over which it passes, tcruZ^yrv of ext:.irv&t. rtLciy.Zon^vor.jfrona^T long vis.
Text Appearing After Image:
Fig. 36.—Bones of the forearm and liaiid of a Raven ; palmar aspect, and slightly-dislodged from their normal positions in order the better to show theorigins and insertions of muscles for which the drawing is designed.Life-size, by the author, from a specimen in his own collection. and assists other muscles of that region in retaining thehumerus in its shallow socket. 72. The hrachialis atiticus is a very well-defined andneat little muscle in the Raven (Figs. 24, 29, and 37). Itarises almost entirely fleshy from a circumscribed area onthe inner side of the anconal aspect of the distal extremity 122 THE MYOLOar OF THE RAVEN. of the humerus, its fibres passing directly over the elbow-joint on that side to insert themselves upon the hiteralsurface of the proximal end of the ulna quite up tothe margin of the greater sigmoid cavity. This muscle protects the anterior aspect of the elbow-joint, and assists the hicej)s in flexing the antibrachiumupon the brachium.^ MUSCLES OF THE FOREARM A