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PHYSIOLOGY OF THE DOMESTIC ANIMALS. 



colJSm 



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. (Hanney.) 



C.N., caudate nucleus ; L.N., lenticular nucleus ; 0.7*., optic thalamus; G.P., gray matter of the poos; 

 F.R., formatio reticularis; CD., corpus dentatum; 0, olivary body ; N.C., clavate nucleus; T.N., trian- 

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

 centres around the fissure of Rolando; c.r., fibres of the "corona radi.ata." 1, the "pyramidal tract," 

 arising from the motor centres of the cerebrum and terminating in the cells of the anterior horns of the 

 spinal gray substance (13 and 14) ; 2, 3, and ■!. fibres connecting the cerebral cortex, the caudate nucleus, 

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

 and 7 to the cerebellum; , r >, fibres of the superior cerebellar peduncle; (», 7, 8, 9, and ID 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 quadrigeinina: 13, the cells of the cord connected 

 with the direct pi/raiti U/al tract ; M, the cells of the cord connected with the crossed pyramidal tract ; 15, 

 fibres of the column of Burdach, terminating superiorly in the triangular nucleus: 16, fibres of the 

 column of Gull, terminating superiorly in the clavate nucleus ; 19, fibres of the cord which terminate in 

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



