898 



THE NERVOUS SYSTEM 



(3) The nuclei of termination of the cranial nerves, especially those of the vestibular and 

 trigeminus, send fibres also into the cerebellum. 



IV. The Short 'Reflex' Paths of the Cranial Nerves 



These consist of the central branches of their afferent or sensory fibres, bearing impulses to 

 the nuclei of origin of both their own motor components and to the nuclei of origin of other 



Fig. 707. — Scheme of Principal Ascending Cerebellar Conduction Paths. 



v"V"'** Corona radiata 



Thalamus 

 Lateral nucleus of 

 thalamus 

 — Internal capsule 



- Red nucleus 



Decussation of brachia conjunctiva 

 Nucleus fastigii 



» Dentate nucleus 



^^ V Vermis of 

 *j cerebellum 

 :5v> -^^^ »' (displacedj 



., Ganglia of afferent cranial nerves 

 (vestibular chiefly) 



Nucleus of funiculus cuneatus 

 Nucleus of funiculus gracilis 



Spinal ganglia 



motor nerves. Fibres to tlie more distant nuclei pass to tlicm by way of the medial longi- 

 tudinal fasciculus. Instead of terminating in the motor nuclei directly, the sensory fibres are 

 usually interrupted by a third or intermediate neurone interposed in the chain. The vagus and 

 glosso-pharyngcus arc connected by way of the solitary fasciculus and its nucleus with the 

 structures below their level of entrance, even with the ventral horn cells of the upper segments 

 of the cervical cord, and through these with the muscles of respiration. 



