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VETERINARY PHYSIOLOGY 



interrupted the result is a loss of the kinsesthetic sense and 

 a loss of the tactile sense for a short distance below the lesion, 

 but not of the rest of the tactile sense or of the thermal sense 

 or of pain. They form synapses in the nuclei of the dorsal 

 columns in the medulla in which they terminate, and, from 

 these synapses, fibres cross the middle line to run headwards to 

 the brain in the fillet (see p. 175) (fig 82, i and A). 



,C 



E 



FIG. 82. To show redistribution of impulses in the spinal cord. 1 to 5, incoming 

 fibres of dorsal root; A, tract of kinaesthetic sense; B, tract of un- 

 conscious impulses for muscular co-ordination and tone ; C, same as B, 

 but on opposite side ; D, tract of impulses of pain, heat and cold ; E, 

 tract of impulses of touch and pressure. (PAGE MAY.) 



3. From the cells of Lockhart Clarke, with which the third 

 set of fibres form synapses (1) axons sweep outwards to take 

 up a position on the dorso-lateral margin of the cord and to 

 constitute the direct eerebellar tract which runs up to the 

 cerebellum (fig 82, -j and B) ; (2) other axons cross the ventral 



