^42 



NERVOUS SYSTEM OF VERTEBRATES. 



tially unchanged. The fibers from other brain centers have 

 conformed to the plan of structure of the cerebellum, and deliver 



Fig. 123. — Two schemes to show the course of impulses in the cerebellar cortex. 

 After Cajal. In the upper figure: A, moss fibers; B, neurites of Purkinje cells; 

 a, granules; b, fibers of molecular layer; c, cell of type II; d, Purkinje cell. In 

 the lower figure: b, basket cell; c, Purkinje cell; d. net-like fiber. 



their impulses either to the granule cells or directly to the 

 Purkinje cells. All impulses received by the granules are 

 transferred to the Purkinje cells through the molecular layer, 



