896 



THE NERVOUS SYSTEM 



3. Hypothalamic nucleus and lateral nucleus of thalamus. 



(a) Internal capsule, posterior segment of fronto-parietal portion. 



(b) Corona radiata, fronto-parietal part. 



(c) Cerebral cortex — chiefly lower third of posterior central gyrus. 



Fig. 705. — Scheme of Ascending or Spino-cerebral Conduction Pathways. 



- - Fibrae propriae 

 Pyramidal fibre 



, » Corona radiata 



Internal capsule 

 Hypothalamic nucleus 



Fibre to hypothalamic 

 nucleus of same side 



Nuclei of termination of 

 sensory cranial nerves 



Ganglia of sensory cranial nerves 



Nucleus of spinal tract of trigeminus 



Nucleus of fasciculus 



cuneatus 

 Nucleus of fasciculus 

 gracilis 



Posterior root 

 ' Spinal 

 ganglion 



B. Descending system of neurones. 



1. Pyramidal cells of opercular region of somaisthetic area. 

 (a) Corona radiata, fronto-pariotal. 

 {b) Internal capsul(!, genu chiefly. 



(c) Basis of cerebral peduncle and peduncle. 



(d) Decussation in brain stem. 



Fasciculus cuneatus 

 Fasciculus gracilis 



I 



