nuc.com.post 



neuropil in the pars dorsalis thalami (p.d.th.) marks the area from which the 

 tractus thalamo-frontalis anterior arises (cf. fig. 57). Between this neuropil 

 and the stria medullaris (str.med.), which is very incompletely impregnated, 

 are vertical fibers passing between the pars dorsalis and the pars ventralis of 

 the thalamus, the tractus dorso-ventralis thalami (tr.d.v.th.). X 30 (ciiic, 3-2-3). 



Fig. 59 From the same specimen as the last two sections nearer the median 

 plane, illustrating one neuron from the ventral part of the nucleus of tbetuber- 

 culum posterius (nuc.tub.p.), and dorsally of this an imperfect impregnation of 

 the nucleus of the commissura posterior (nuc.com.post.). Dendrites of these 

 neurons reach backward into the terminal arborizations of the commissura pos- 

 terior (com.post.) ; cf. figure 60. The position of the sulcus medius thalami {s.m.) 

 is indicated as projected from the adjacent section medially. Above this line 

 are several neurons of the extreme caudal part of the pars dorsalis thalami, two 

 of which are entered from the adjacent section laterally. Their dendrites ar- 

 borize among fibers of the tractus thalamo-pedunci:laris dorsalis profundus 

 which run parallel with the tractus habenulo-peduncularis (J.retr.). The axons 

 of all of the neurons here figuves probably enter the tegmental fascicles. X 74 

 (ciiicv 3-2-1). 



Fig. 60 A single neuron of the nucleus of the commissura posterior from the 

 section adjacent to the last medially. X 74 (ciiic, 3-1-9). 



Fig. 61 A single neuron of the interpeduncular nucleus from a sagittal sec- 

 tion near the median plane and a short distance caudad of the fovea isthmi. 

 The ventral surface of the brain is below and the rostral end ai; the left. The 



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