On the myology of Hyrax capensis / by James Murie and St. George J. Mivart.

  • Murie, James.
Date:
[1865]
Catalogue details

Licence: Public Domain Mark

Credit: On the myology of Hyrax capensis / by James Murie and St. George J. Mivart. 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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    clear as to this essential nature of the iransversalis cervicis in Man ; and Burdach corrects Meckel on this point as regards the Apes. Of course it cannot be considered as the biventer cervicis, as this is always on the inside of the complexus. The transversalis cervicis is but the continuation of the lonyis- simus dorsi, and is very wide and conspicuous. It is inserted into the five lowest cervical vertebrae by muscle, which has superimposed conspicuous tendons, one to each transverse process. This is the cervicalis ascendens of Meckel*. The cervicalis ascendens is wanting, as there is no evident continu- ation of the sac?'o-lu?nbalis into the neck, except perhaps a few fibres to the seventh cervical vertebra. The rectus capitis posticus major is a large and powerful muscle, arising from the spine of the axis, its whole outer surface, and with an insertion into the occiput. The rectus capitis anticus minor, as usual, extends from tbe neural laminae of the atlas to the occiput, beneath the last. The origin of the obliquus capitis superior is the transverse pro- cess of the atlas. Its insertion is into the occiput, between the su- perior and inferior curved lines. The obliquus capitis inferior is very large. Its origin is from the neural lamina and base of the spinous process of the axis, and it is inserted into the transverse process of the atlas. These last four muscles are exceedingly well developed, and they together form a prominent inverted fleshy pyramid. The levator claviculce is strong; it arises from the transverse pro- cess of the atlas, and is inserted into the fascia covering the teres minor, passing over the neck of the scapula. Meckel does not notice this muscle in the Hyrax. Muscles of the Back and Abdomen. Trapezius.—This muscle is very extensive, arising along the me- dian line of the back, from the occiput as far as the middle of the dorsal region, overlapping the latissimus dorsi. It is inserted into the scapula—the anterior part of the muscle upon the spine towards its acromial end, the posterior part of the muscle below (behind) the spine. Some fibres of the anterior portion of the muscle are involved with the platysma myoides, somewhat in the manner described by Meckel f. The rhomboideus major has origin from the spines of the 6th, 7th, 8th, 9th, and I Oth dorsal vertebrae, with an insertion into the poste- rior angle of the scapula. The rhomboideus minor is represented by a small delicate muscle, arising from the spine of the sixth dorsal vertebra, and being inserted, superficially to the last, into the cartilaginous portion of the scapula. These muscles are probably subject to some variation, as Meckel £ describes three muscles in the place of these two, and in addition our next muscle also. * Loc. cit. p. 149. t Loc. cit. p. 225. J Loc. cii. p. 241. [6]