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PHYSIOLOGY OF THE DOMESTIC ANIMALS. 



Spinal Cord 



Fig. 357.— A Diagram Designed to Illustrate the Course of certain 

 .Nerve-Tracts Within the Cerebrum, Crus, Pons, Medulla, and 

 Spinal Cord. Modified from Flechsig. (Ranney.) 



C.N., caudate nucleus ; L.N., lenticular nucleus ; O.T., optic thalamus; G.P., gray matter of the pons ; 

 F. JR., for bio reticularis ; CD., corpus dentatum; 0, olivary body ; N.C., elavate nucleus; T.N., trian- 

 gular nucleus; C.Q., corpora quadngeinina; T.C., upper limit of the capsular fibres; m, m, m, motor 



centres ar id the fissure of Rolando; c.r., fibres of the " corona radiata." I, the "pyramidal tract," 



arising from the tor centres of the cerebrum and terminating in the cells "!' the anterior horns of the 



spinal graj substance l 13 and Uj ;. 2, :s. and I. fibres connecting the cerebral cortex, the caudate nucleus, 

 and the lenticular nucleus with the gray matter of On pons after decussation, and then prolonged as 6 

 and 7 to the cerebellum; 5, fibres of the superior cerebellar pedunch ; fi, 7, 8, 9, and 10 show by their 

 colors the tracts with which they are associated, as well as their origin and termination : 11 and 17. the 

 "direct cerebellar tract " of the spinal cord (whose probable termination is not correctly shown in the 

 cut, as it probably ends in the vermiform process); 12, the lemniscus or "fillet" tract, connecting the 

 olivary body with the optic thalamus and the corpora cjuadrigemina ; 13, the cells of the cord conneoted 

 with the direct pyramidal tract ,- 1 i, the cells of the cord connected with the crossed pyramidal tract; 15, 

 ■fibres of the column of Burdarh, terminating superiorly in the triunqiihir nurlnts; ll>, fibres of the 

 column ■>/' (■•'//, terminating superiorly in the chimin nucleus ; L9, fibres of the cord which terminate in 

 the so-called " reticular formation " directly ; is, fibres of the ret. form, going to the cerebellum. 



