The muscles of the fore and hind limbs in Dasypus sexcinctus / by John Charles Galton.

  • Galton, John Charles.
Date:
[1868]
Catalogue details

Licence: Public Domain Mark

Credit: The muscles of the fore and hind limbs in Dasypus sexcinctus / by John Charles Galton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Quadriceps extensor'^.—This compound muscle is made up of the following ele- ments :— a. Mectus.—A comparatively slender, fusiform slip, thickest in the middle, and taper- ing towards its origin and insertion. It arises from a smooth oval facet upon the ilium, situated immediately above, but slightly posterior to the eotyloid cavity. It takes a perfectly straight course to its insertion into the upper edge of the patella, above the points of insertion of the other components of the extensor. j3. Vastus externus.—A large fleshy mass, arising from the greater part of the external aspect of the femur. Its highest fibres of origin are derived from a portion of the inner face of the great troehanter, and from the outer and posterior aspect of the same tube- rosity ; the space, too, intervening between the third and the above-mentioned trochanter is filled up by fibres of origin of this musele. The muscle arises, moreover, from the whole superior aspect of the third trochanter, also from the outer part of the anterior face of the rest of the femur as far as the root of the condyles. It is inserted into the superior edge of the patella, to the outer side of the insertion of the rectus. 7. Vastus internus.—Is much smaller than the preceding faetor; it arises from the superior and inner aspect of the femur, from the space intervening between the “ greater” and “lesser” trochanters to the root of the condyles. It finds insertion at the upper edge of the patella, to the inner side of the termination of the rectus. No distinct factor answering to the crureus appeared to be present. Sartorius.—A very delicate muscle, which arises from the outer edge of the tendon of the psoas parvus, at the distance of about half an inch from the insertion of the latter. It passes downwards, diagonally, along the inner aspect of the thigh, as a thin, strap- like slip, and terminatesin the aponeurotic fascia which covers the inner face of the knee and leg. This muscle would appear to play the part, in the animal to which it belongs, of a kind of tensor fascice femoris internus. I have not found any description of a similar origin of this muscle in any other animal. According to MeckeP, the sartorius in the Ai takes origin from the aponeurosis of the external oblique; but this statement is contradicted by the editor of the second edition of Cuvier’s ‘ Le9ons,’ who declares that the muscle in question arises from the ilium That, however, which Meckel has stated erroneously of the Sloth, takes place, if Krause’s testimony be trustworthy, in the Rabbit, in Avhich animal the sartorius is described as taking origin from the fascia of the external oblique, in the middle of Pou- part's ligamenV. Gracilis.—A slender, broad, but thin, wafer-like muscle, having an extensive origin and insertion. Its origin, which is shaped thus > (right side), is derived from the adjacent portions of the os pubis and ischium, from the last inch anteriorly of the superior edge of the former bone, beginning where the origin of the pectineus terminates, and from the first incb anteriorly of the inferior edge of the latter bone. * Cuvier, Anatomie Comparee, pi. 259, figs. 2 & 3, pi, 260. * Op. cit. p. 614. ^ Vol. i. p. 519. ■' Die Anatomie des Kaninchens, Leipzig, 1868, p. 116.