410 



THE BRAIN OF MAMMALS, BY TH. MEYNERT. 



cut off by the section. On the other hand, the fact was already 

 known to Burdach and Gratiolet, that the fasciculi of the 

 anterior commissure run into no part of the cortex except that 

 of the occipital and temporal lobes. There are accordingly 

 represented in the two last-named parts of the brain hemi- 

 spheres (1) the sensory surfaces connected with the spinal cord ; 

 (2) the retina ; and (3) the olfactory bulb. These lobes accord- 

 Fig. 244. 



Fig. 244. Transparent section from the upper trunk ganglia and 

 the insula of Man, at the height of the anterior commissure (close 

 behind the posterior border of the orbital convolutions and the olfactory 

 lobe). I, Insula ; Cl, claustrum ; Ce, external capsule ; Liu, third 

 link of the lenticular nucleus ; Nc, caput of the corpus striatum ; 

 Ntf, base of the head of the corpus striatum above the lamina per- 

 f orata antica ; M, medulla of the cerebral lobe (foot of the corona 

 radiata) ; Ci, internal capsule ; Ca, median portion of the anterior 

 commissure ; M' , portion of the anterior commissure belonging to 

 the hemisphere ; E, portion of the anterior commissure belonging to 

 the olfactory lobe. 



ingly contrast with the frontal lobe ; which is chiefly connected 

 with the motor ganglia. The foregoing statements exhaust 

 our knowledge of the connection with the cortex of the brain of 

 the following parts, viz., that part of the radiations of the 

 optic tract which enters the corpora geniculata ; the anterior 

 commissure ; and the above-named representation of the pos- 

 terior columns in the crusta. 



