. A treatise on nervous and mental diseases, for students and practitioners of medicine. portion of the internal capsule, pass through the opticthalamus anterior to the pulvinar and into the anterior quadri-geminal body, and thence to tin; j^ulvinar, from which they go ondown to the oi)tic tract. The; optic tract takes its origin in theanterior quadrigeminal body in a fine network coming from numerous 44 INTKODUCTORY. delicate cells iii Mliat is known as the stratum zonale, as well as fromthe lateral geniculate body, the pulvinar, and a deeper-lying massof gray matter Avith which we shall soon
. A treatise on nervous and mental diseases, for students and practitioners of medicine. portion of the internal capsule, pass through the opticthalamus anterior to the pulvinar and into the anterior quadri-geminal body, and thence to tin; j^ulvinar, from which they go ondown to the oi)tic tract. The; optic tract takes its origin in theanterior quadrigeminal body in a fine network coming from numerous 44 INTKODUCTORY. delicate cells iii Mliat is known as the stratum zonale, as well as fromthe lateral geniculate body, the pulvinar, and a deeper-lying massof gray matter Avith which we shall soon become acquainted, the sub-thalamic body, and also from the gray matter at the base of thebrain, near the infundibuluni. The function of the posterior quad-rigeminal body is unkQ0^vn, although Spitzka has shown that itsextraordinary development in cetaceans and the large bands of fibrespassing from it to the nucleus of the auditory nerve render it probablethat it has some relation to hearing;; and Bagiuski has demonstrated Fig. 27. OPr/C THALAMU; ^P/NeAL GLAND LATCRALGLNICULHrCBOOY. CftPPOnH\QUADPie£MWA _J^WOLE I ^vT^^ BENici/iATeBOoy „^ -MTVRC. INTO AQ 3U 0 SYLVIUS 4i* VCNTKICLE APERTUKE INTO CENTROF SPINAL CORD Drawing of specimen hardened in alcohol, showing pulvinar, pineal gland, corporaquadrigemina, geniculate bodies, superior cerebellar peduncles, fourth ventricle, aper-ture into aqueduct of Sylvius, aperture into central canal of spinal cord, restiformbodies, and striae acousticce. that this posterior quadrigeminal body atrophies after destruction ofthe auditory nerve. We can perceive, therefore, that the course ofthe optic nerve is not so complicated as it would seem at first the anterior quadrigeminal body the optic nerve fibres go to thecortex through the optic thalamus anterior to the pulvinar, iuto theposterior portion of the internal capsule, and thence to the occipitallobe as represented in Fig. 28. From this same point of origin iuthe auterior qua
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidtreatiseonnervou00gray
