. Human physiology (Volume 1) . er size and hardness in aquatic animals, it is presumable thatthey perform some office of importance in They aretermed by Breschet, otolithes and otoconies, according as they areof a hard or a soft consistence. The small square figures (Fig. 18)represent their size and appearance in the dog and the hare. It is in the cavities of the internal ear, and on the different partsof the membranous labyrinth, that the auditory or acoustic nerve is distributed. ThisFig- !9. nerve is the portio mol- lis of the seventh pairof most anatomists. Itarises, like the o
. Human physiology (Volume 1) . er size and hardness in aquatic animals, it is presumable thatthey perform some office of importance in They aretermed by Breschet, otolithes and otoconies, according as they areof a hard or a soft consistence. The small square figures (Fig. 18)represent their size and appearance in the dog and the hare. It is in the cavities of the internal ear, and on the different partsof the membranous labyrinth, that the auditory or acoustic nerve is distributed. ThisFig- !9. nerve is the portio mol- lis of the seventh pairof most anatomists. Itarises, like the othernerves of the senses,from the medulla oblon-gata, and near the an-terior paries of thefourth ventricle. Thenceit passes obliquely out-wards, forwards, andupwards, and entersthe meatus auditoriusinterims, the foramenof which is situate onthe posterior surface ofthe pars petrosa. Thebase of this meatuscorresponds to the inner 11. Utriculus communis SllrfaPP nf the voctiknlow. 12. Ampulla of oblique olul£lu= 01 lne VeStlDUle,. Auditory Ncrvt. 1. Corpora quadrigemina. 2 2. Processus e ccrebello ad testes. 3 3. Corpora restiformia. 4. Fourth ventricle. 5. Iter a tertio ad quarlum ventriculum. (i. Calamus scrip Posterior median columns of spinal cord forming torius by their divergence the point of the calamus, also calledventricle of Arantius. 8. Lines of origin of 4th ventricle, andof auditory nerve. 9. Anterior branch distributed to Posterior or vestibular branch. concealing sacculus proprius from view. la. ^\mpuiiaofobliquc semicircular canal. 13. Ampulla; of perpendicular and hori- and tO the baSP of fhpzontal semicircular canals. —(IVilson.) ., m, cochlea. Through the * Breschet, Memoir, de lAcademie de Medecine, torn. v.; and Recherches Anato-miqucs et Pbysiologiques sur lOrgane de lOuic, &c, Paris, 1836. SOUND. 147 Fig. 20.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectphysiology, bookyear1
