174 



PHYSIOLOGY OF CENTRAL NERVOUS SYSTEM. 



Fig. 77. Schema of the projection fibers of the cerebrum and of the peduncles of the 

 cerebellum ; lateral view of the internal capsule : A, Tract from the frontal gyri to the pons 

 nuclei, and so to the cerebellum (frontal cerebro-cortico-pontal tract) ; B, the motor 

 (pyramidal) tract ; C, the sensory (body sense) tract ; D, the visual tract ; E, the auditory 

 tract ; F, the fibers of the superior peduncle of the cerebellum ; G, fibers of the middle 

 peduncle uniting with A in the pons ; H, fibers of the inferior peduncle of the cerebellum ; 

 J, fibers between the auditory nucleus and the inferior quadrigeminal body; K, motor 

 (pyramidal) decussation in the bulb; Vt, fourth ventricle. The numerals refer to the 

 cranial nerves. (Modified from Starr.) 



Fig. 78. Lateral view of a human hemisphere, showing the bundles of association 

 fibers (Starr): A, A, Between adjacent gyri; B, between frontal and occipital areas; C, 

 between frontal and temporal areas, cingulum ; D, between frontal and temporal areas, 

 fasciculus uncinatus; E, between occipital and temporal areas, fasciculus longitudinalis 

 inferior; C.N, caudate nucleus; O.T, optic thalamus. 



