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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    It passes forwards, closely embracing for about the first half of its course the large subjacent adductor muscle, and joins the aponeurosis (common also to the sartorms above and the semitendinosus below) which is inserted obliquely into the tibia, between its anterior ridge and the strongly developed internal lateral ligament, and becomes, moreover, continuous with the fascia covering the front aspect of the leg. The origin and insertion of this muscle is very clearly and truthfully represented by Cuvier in one of his illustrations of the myology of Dasypus^. Semimembranosus.—A strong, uniformly broad, strap-shaped muscle, which arises from the ischium, anterior to the tuberosity of the bone, immediately below the origins of the adductor and the crus penis. It passes along the inner aspect of the thigh, to be inserted, the lower half, obliquely into the tibia, immediately posterior to and covered by, at its insertion, the internal lateral ligament, the upper half into the facet and part of the ridge on the inner aspect of the internal condyle of the femur. The inferior edge of the muscle, near its termination, is, moreover, connected with a strong aponeurosis, common also to the semitendinosus and gracilis. Semitendinosus.—A narrow strap-shaped muscle, arising from the tuberosity of the ischium, in close company with, but immediately posterior to, the most posterior at origin of the two divisions of the biceps, and passing across to the inner side of the leg. After a somewhat long course, it terminates a little above the inner malleolus in a strong aponeurosis, common to the terminal portion of the gracilis and semimembranosus, and which is attached to the strongly developed “ shin-ridge ” of the tibia. By its lower edge the muscle is connected with strong fascia, continuous with the inner edge of the inner division of the gastrocnemius, close to its insertion. Biceps.—This muscle arises from the posterior (superior) edge of the ischium, imme- diately anterior to its tuberosity. It is made up of two factors, which are distinct from each other throughout the whole of their course. The most anterior at origin arises, partly fieshy, partly distinctly tendinous, from the ischium, and, after proceeding halfway on its course, sends off, nearly at a right angle, from its upper or outer edge, a slender muscular slip, which is finally lost in the fascia covering the outer aspect of the leg, not far below the lowest portion of the tensor vagincB femoris. The main part of this factor of the biceps terminates in the strong fascia in the neighbourhood of the heel, at a little distance above the calcaneal process. The second division of the muscle arises slightly posterior, but superior, to the former portion, taking origin from the tuberosity itself of the ischium, and being intimately connected with those fibres of the gluteus maximius which have their origin at this spot. Early in its course it crosses over and passes to the inner side of its fellow, on which side it remains, up to its termination in strong fascia which is in close relation with the tendon of the outermost division of the gastrocnemius, separating this muscle at this point from the terminal part of the first-described factor of the biceps. Cuvier represents, somewhat vaguely, this muscle as a broad triangular sheet, covering the whole of the outer aspect of the calf, and seemingly blending with its fascia