. Essentials of physiology, arranged in the form of questions and answers, prepared especially for students of medicine. owing; third, a centre for the movementsof mastication ; fourth, the chief vaso-motor centre which governsthe bloodvessels all over the body (see Circulation); fifth, thecardio-inhibitory centre for the regulation of the movements of theheart through the pneumogastrics; sixth, the superior cilio-spinalcentres which govern the movements of the iris1; seventh, theinner and outer nuclei of the special sense of hearing; and eighth,the glosso-pharyngeal nuclei for the sense of ta
. Essentials of physiology, arranged in the form of questions and answers, prepared especially for students of medicine. owing; third, a centre for the movementsof mastication ; fourth, the chief vaso-motor centre which governsthe bloodvessels all over the body (see Circulation); fifth, thecardio-inhibitory centre for the regulation of the movements of theheart through the pneumogastrics; sixth, the superior cilio-spinalcentres which govern the movements of the iris1; seventh, theinner and outer nuclei of the special sense of hearing; and eighth,the glosso-pharyngeal nuclei for the sense of taste; ninth, thecentres for vomiting. The medulla oblongata also gives rise fromits posterior surface and its continuation to the cranial nervesfrom the 12th to the 5th inclusive. (See Figs. 21 and 22.) How do you know that the medulla contains all thosecentres which are necessary for the continuanceof life ?Because the brain and cerebellum can be destroyed and yet the respiration and heart go on unimpaired. 1 Remember that the inferior cilio-spinal centre acta thus also. 132 ESSENTIALS OF HUMAN PHYSIOLOGY. Fig. Diagram of posterior aspect of medulla oblongata showing positions of the nuclei ofthe cranial nerves. (After Erb and Ferrier.) v, Motor nucleus; v, middle; and v, inferior sensory nucleus of the fifth nerve;vi, abducens nucleus; vn, facial nucleus ; vm, inner, and vm, outer auditory nucleus ;vm and vm, divisions of the anterior auditory nucleus ; ix, glosso-pharyngealnucleus; x, vagus nucleus; xi, accessorius nucleus; xii, hypoglossal nucleus; 1,middle cerebellar peduncle ; 2, superior cerebellar peduncle; 3, inferior cerebellarpeduncle ; 4, eminentia teres; 5, stria; acousticse ; 6, ala cinerea.
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