. The anatomy of the domestic animals. Veterinary anatomy. 262 AND MUSCLES OF THE HORSE inedially, the great cornu of the hyoid lione, the pharynx, the laryiLx, the tensor ])ahiti, niylo-hyoideus, digastricus, and stylo-hyoideiis muscles, the guttural pouch, tlie external maxillary vessels, the ninth and twelfth nerves, the mandibular salivary glanil, the mandibular and parotid ducts, anil the mandibular and i5har.\ngeal lymph- elands. Blood-supply.—Internal maxillary, masseteric, and iiifcrinr ah'cdlar arteries. Nerrc-ftup/ih/.—Mandilmlar niTve. 4. Pterygoideus lateralis (s. externus)
. The anatomy of the domestic animals. Veterinary anatomy. 262 AND MUSCLES OF THE HORSE inedially, the great cornu of the hyoid lione, the pharynx, the laryiLx, the tensor ])ahiti, niylo-hyoideus, digastricus, and stylo-hyoideiis muscles, the guttural pouch, tlie external maxillary vessels, the ninth and twelfth nerves, the mandibular salivary glanil, the mandibular and parotid ducts, anil the mandibular and i5har.\ngeal lymph- elands. Blood-supply.—Internal maxillary, masseteric, and iiifcrinr ah'cdlar arteries. Nerrc-ftup/ih/.—Mandilmlar niTve. 4. Pterygoideus lateralis (s. externus).—This muscle is considerably smaller than the preceding one, and is situatetl lateral to its upper part. Origin.—The lateral surface of the pterygoid process of the sphenoid bone. Insertion.—The medial surface of the neck, the medial part of the anterior border of the condyle of the mandible and the articular disc. Action.—Acting together, to draw the lower jaw forward; acting singly, to Eihmo- Septum of tiirbinults Jronlal sinuSL Diiraal iiuatus Ihirsal turJiiiiale Ventral (urhinatc \^i """^'^^^mL.~^i^^^^^^^^^H ' .-3. ,^ Veritral meatus. anliiuir belly Fio. 2IU.—S. iL Section hf He IntirmedUite tendon ULAR KeGIOX and Nasal and Horse, Showing Deep Pterygo-: Cranial Cavities. 1, Cerebral compartment of cranijil cavity; S, cerebellar compartment of same; 5, tentorium osseum; 4, ten- torium cerebelli; 6. sphenoitlal sinus; ij. hanmlus of pterygoid bone-tendon of tensor palati cut off short at anterior border of hamulus; 7, mylo-glossus. The olfactory mucous membrane is shaded. move the jaw also toward the side opposite to the muscle acting. The latter action is due to the fact that the origin is nearer to the median plane than the insertion. Structure.—The muscle is almost entirely fleshy, and the fibers are almost longitudinal in direction. Some of them are inserted into the edge of the articular disc. h'elntions.—Laterally, the tcmporo-mandibula
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
