. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH, 339 The two genio-glossi lie together on the median plane of'the tongue, except towards their origin, where they are constantly kept apart by adipose tissue. Their inferior border responds to the genio-hyoid muscles, and their anterior fibres are partly included between the two mucous layers of the fraenum linguaB. They are re- lated, by their external face, to the basio- or great hyo-glossus, the stylo-glossus, the sublingual gland, the lingual artery, and the terminal branches of the three lingual nerves. T
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH, 339 The two genio-glossi lie together on the median plane of'the tongue, except towards their origin, where they are constantly kept apart by adipose tissue. Their inferior border responds to the genio-hyoid muscles, and their anterior fibres are partly included between the two mucous layers of the fraenum linguaB. They are re- lated, by their external face, to the basio- or great hyo-glossus, the stylo-glossus, the sublingual gland, the lingual artery, and the terminal branches of the three lingual nerves. The action of the genio-glossus is complex; accord- ing to the portion of its fibres which contract, it will carry the tongue forwards, pull it into the buccal cavity, or draw it downwards into the floor of the mouth. (Fig, 149, 4.). SMALL HYO-GLOSSUS. jnonym.—^Lingualis superior of Man. (Lingualis of Perci- vall.) Under this name is described a thin band, formed of parallel fibres, which is exposed immediately on remov- ing the mucous membrane, with the subjacent glands, from the base of the tongue. This band arises from the inner side of the articulation uniting the body of the os hyoides to its small branch. It passes above the trans- verse muscle of that bone, which it crosses perpendi- cularly, is surrounded at this point by a great mass of adipose tissue, and is prolonged directly forward, be- neath the lingual mucous membrane. Its fibres then vanish, either on the superior aspect of the tongue or on its sides, or they descend obliquely in crossing the direction of the hyo-glossus, to join the superior border of the stylo-glossus (Fig. 149, 3). (This muscle contracts and retracts the tongue.) PHARYXGO-GLOSSUS. {Synonym.— palato-glossus of Man.) A rudimentary muscle formed of parallel fibres, which, from their origin on the lateral wall of the pharynx, pass outside the articular angle of the branches of the OS hyoides, and between the hyo-glossus and genio- glossus,
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
