THE NERVOUS SYSTEM 483 



V. Sight: Retinal bipolar ganglionic + rctino-gcniculate (optic nerve and 

 tract, crossed and uncrossed in chiasma) + geniculo-pallial (to calcarine cortex) 

 neurones. (Fig. 358.) 



VI. Smell: Olfactory ganglionic + bulbo-rhincnccphalic-pallial (crossed and 

 uncrossed to hippocampal cortex) neurones. (Fig. 359.) 



\'II. Cerebello-pallial: Cerebellar cortical + dcntato-rubral and dentato- 

 thalamic (superior cerebellar peduncle, crossed) + rubro-thalamo-pallial 

 neurones. (Fig. 345.) 



B. Afferent Mesencephalic 



\1II, A comparatively unimportant path composed of spinal ganglionic 

 + spino-coUicular (crossed) and l)ulho-coUicular (? medial fillet, crossed) 

 neurones. 



C. Afferent Cerebellar 



IX. The spinal ganglionic (innervating proprioceptors of body) + spino- 

 cerebellar path to vermis of cerebellum. The dorsal spino-cerebellar and ventral 

 spino-cerebellar tracts of this path pursue somewhat different routes. (Figs. 

 331 and 345.) This path may receive accessions from the columns of GoU and 

 Burdach and their nuclei in the bulb. 



X. The vestibular ganglionic (Scarpa) + Deitero-cerebellar path. The 

 vestibular gangUonic neurones may send axones to the cerebellum without inter- 

 ruption. (Figs. 331, 339 and 345.) Paths via other cranial nerves, especially 

 nerves V and II, may also pass to the cerebellum. 



OUvo-cerebellar neurones form part of another, not well known, afferent 

 cerebellar path. 



Efferent pallial path XIII is obviously also an afferent cerebellar path. 



Efferent Suprasegmental Paths 

 A . Efferent Pallial 



XI. Voluntary Motor: Pallio (precentral cortex) — spinal (crossed) + spinal 

 peripheral somatic motor neurones, also pallio-tegmental and pallio-bulbar 

 (crossed and uncrossed) + cranial peripheral somatic motor and branchiomotor 

 neurones. A short intersegmental system probably is intercalated between 

 the pallial and peripheral neurone systems. (Figs. 330, 331.) 



XII. Splanchnic Efferent (except branchiomotor) : This is the pallio-bulbo- 

 spino-sympathetic path mentioned on page 473 and comprises also descending 

 pallial fibres which act upon neurones in the brain whose axones pass out as 

 cranial preganglionic fibres. 



XIII. Pallio-cerebeUar: Pallio-pontile + ponto-cerebellar (middle cere- 

 bellar peduncle, crossed) neurones. (Figs. 331, 345.) 



XIV. PaUio-rubral + rubro-spinal (crossed) -f- peripheral motor neurones 

 (p. 518). This path may partly supplement, physiologically, path XI. 



Other less important paths are mentioned on p. 529. 



