. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . nbehind. It arises above from two points, viz: the ridgebounding the hinder part of the osseous ear, and secondlythe depression to its mesial side. The two heads almostimmediately blend as they pass downwards and forwards,as a curved fleshy mass, to become inserted into theposterior aspect of the articular end of the mandible,including the angle (Figs. 4 and 7). To study thismuscle properly it should be transversely divided acrossits belly at about its middle ; the two extremities may THE
. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . nbehind. It arises above from two points, viz: the ridgebounding the hinder part of the osseous ear, and secondlythe depression to its mesial side. The two heads almostimmediately blend as they pass downwards and forwards,as a curved fleshy mass, to become inserted into theposterior aspect of the articular end of the mandible,including the angle (Figs. 4 and 7). To study thismuscle properly it should be transversely divided acrossits belly at about its middle ; the two extremities may THE MUSCLES OF THE HEAD. 19 then be easily dissected up,above, to its origin; below, to itsinsertion. The relations of this group, the openers and closersof the jaw, to the surrounding structures, as the ear,the dermo-temporalis muscle, and the quadrate, shouldbe carefully examined. To expose the next set, divide the biventer maxillae asalready directed, say on the right side; cut the corre-sponding tendon of insertion of the temporal; divide themasseter as its origin ; and finally disarticulate the man-. biventer maxillccrectus capitis posticus major FIG. 4.—Posterior view of skull of Raven. Life-size. Shows the origin of themuscles upon this aspect. After nature, by the writer. dible, lifting the cranium so that we have a plain view ofits under side. Matters may be somewhat improved,too, by severing the zygoma at its middle, and pullingthe extremities upwards. 17. The entotympanic is a small, spindle-shapedmuscle, which arises quite fleshy from the side of thebasisphenoid, and to a limited extent from the baseof the rostrum immediately beyond it. As it passesbackwards and downwards, it rapidly contracts to form c 2 20 THE MYOLOGY OF THE RAVEX. a double tendinous slip. One of these is inserted into alittle spine-like process on the upper side of the shaftof the corresponding pterygoid, close to its quadratalarticular end. The other is inserted into the quadrateitself, close to
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Keywords: ., bookcentury1800, bookcollection, bookdecade1890, booksubjectmuscl
