<>!' CDXDI CTIOX /M'/V/.S 



875 



4. Fibres from medial geniculale body and nucleus of inferior quadrigeuiinate body 

 pass into internal capsule and through temporal part of corona radial a to middle 

 third of Mipcnor leinpiiral gyru- and adjacent portions (aiidilciry a 



o. i''nmi MijHTior olivary nucleus arise lilire.- which terminate in nucleu- i>\ abducens 

 in- put by v. ay (it the medial longitudinal fasciculus to oilier motor nuclei of 

 cranial BOrVW i peduncle of sii|ierior ojlve). It is probable that (Hires from the 

 auditory area of the cerebral cortex are al.-n distributed to nuclei of the cranial 

 nerves. 



VII. CONDUCTION PATHS OK TIIK < >ITIC APPARATUS 



1. 'Bipolar' cells of retina u ith short (peripheral ) processes to layer of rods and cones (neuro- 

 epithelium) and short centrally directed processes to ganglion-cell layer of retina 

 (nucleus of termination). 



Fro. 650. DIAGRAM OK I'RIN< II-AL PATHWAYS or OPTIC APPARATUS. (After Cunningham.) 



2. Gang4ion-cells of retina give origin to 



() Optic stratum of retina. 

 (6) Optic nerve. 



(c) Optic chiasma; fibres from nasal side of retina cross in chiasma to opposite side; 



fibres from lateral side of retina continue on same side in 



(d) Optic tract to 



3. Pulvinar of tluilauius, lateral geniculate body, and nucleus of superior quadrigeminate 



bodies. 



(a) Fibres from nucleus of superior quadrigeminate bodies pass vent rally to medial 



longitudinal fasciculus of same and opposite sides, and from it are distributed 



to nuclei of origin of eye-muscle nerves. 

 (6) Fibres from lateral geniculate body and pulvinar pass through occipital portion 



of internal capsule and occipito-thalamic radiation (optic radiation) to cortex of 



occipital lobe (visual an 



4. Cells of visual area of cortex send fibres through occipito-thalamic radiation and internal 



capsule to nucleus of Mi|x>rior i|uadriireminate bodie^ (occipito-mesencephalic fasciculus), 

 and thence, probably interrupted by cell- of this nucleus, to nuclei of eye-muscle nerVM. 



5. Cells of nucleus of superior i|uadrij;eniinate body and pulvinar send fibres by way of med'al 



longitudinal fasciculus into lateral and ventral funiculi of spinal cord (see fig. ."71 . 

 chiefly of the opposite -ide. Fibres from the i|iiadrigeminate body cross mid-line in 

 decussation of 'optic-acoustic reflex path' (fig. Oil). 



