Volume 1

On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag.

  • Sonntag, Charles F. (Charles Frederick), -1925
Date:
1923
Catalogue details

Licence: In copyright

Credit: On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag. Source: Wellcome Collection.

    16/118 page 336
    in front with the buccinator, both being attached to the pterygo- mandibular ligament. It is attached to the mylo-hyoid line on the mandible, the internal pterygoid plate, the base of the tongue, the mucous membrane of the floor of the mouth and the bucco- pharyngeal aponeurosis. The lower border is overlapped by the middle constrictor, and the stylo-pharyngeus passes between them as a few separate, but thick, bundles of fibres. Some of these fibres pass into, and blend with, the outer surface of the superior constrictor. The upper part of the muscle is separated by a large sinus of Morgagni from the base of the skull, but the levator palati and tensor palati, which are situated therein, lie horizontally, whereas they are more vertical in Man, and of smaller size. The constrictor is attached above and behind into Text-figure 32. The omo-hyoid muscle (A) and the anatomy of the submental region (B). A.B.O.j P.L.O., and P.M.O: anterior, postero-lateral and postero-mesial bellies of the omo-hyoid muscle; F.S : fatty septum; L.A : lingual artery; N.G.H : nerves to the genio-hyoid muscle; H.B : hyoid bone; S.H. and S.T : sterno- hj'oid and sterno-thyroid muscles; IX and XII: cranial nerves. Other letters as in text-fig. 31. the basis cranii. It is difficult, and in some places impossible, to separate the superior constrictor from the stylo-glossus muscle which courses downwards and forwards on its outer surface. A well-marked bundle of fibres passes towards the angle of the mouth. The middle constrictor of the 'pharynx arises from the deep surface of the hyoid bone in the angle between the greater and lesser cornua, and it is inserted into the mid-dorsal line of the pharynx, its fibres mingling with those of the opposite muscle. It is overlapped by the inferior constrictor. Some fibres of the stylo-pharyngeus pass into its outer surface. Between the superior and middle constrictors there is a non-muscular area anteriorly. The inferior constrictor of the pharynx arises as in
    digitised image 1
    digitised image 2
    digitised image 3