. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . diameters.(Dejerine.) II, second and third nerves; Th, thalamus; Ge and Gt, the externaland internal geniculate bodies; P, peduncle of the cerebrum, containing the pyramidaltracts; F, fillet; Flm, median longitudinal bundle; N, nucleus of the third nerve. STRUCTURE AND RELATIONS OF INTER-BRAIN 85 brain. In the mid-brain can still be recognized the foot and thehood, but the foot has bifurcated into the peduncles of the right andleft cerebral he
. Elements of physiological psychology; a treatise of the activities and nature of the mind, from the physical and experimental points of view . diameters.(Dejerine.) II, second and third nerves; Th, thalamus; Ge and Gt, the externaland internal geniculate bodies; P, peduncle of the cerebrum, containing the pyramidaltracts; F, fillet; Flm, median longitudinal bundle; N, nucleus of the third nerve. STRUCTURE AND RELATIONS OF INTER-BRAIN 85 brain. In the mid-brain can still be recognized the foot and thehood, but the foot has bifurcated into the peduncles of the right andleft cerebral hemispheres. The tegmentum contains the rednucleusj, in which terminate most of those fibres from the cerebel-lum, that were seen decussating in the preceding section. At the. FiQ. 40.—Horizontal Section Through the Brain. (Edinger.) f ? White matter shows white,gray matter gray, and ventricular spaces black. side appear the median and lateral geniculate bodies. The cut-offstump of the second or optic nerve is seen entering the lateral genicu-late body. § 20. The relations of the inter^brain can perhaps be better seenin a section (see Fig. 97, p. 223), which is made vertically throughthe cerebrum, and further to the front than the preceding section;but which includes the thalamus, because of that overlapping of 86 GROSS STRUCTURE OF THE NERVOUS SYSTEM some of the end-brain and inter-brain of which mention has al-ready been made (see p. 51). Of the pallium, the temporal lobe is seen below, and the frontallobe above, separated by the fissure of Sylvius, which spreads outat its bottom into the Island. Passing inward from the island,we encounter first a strip of white matter, then a strip of gray(the claustrum), next the lenticular nucleus, showing three p
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