Human anatomy, including structure and development and practical considerations . between the thalamus and the more laterally placed lenticular 1 i20 HI MAN nucleus, and establisliL-s the iniijortaiit ])athuay iransinitlini^ the filjre-tracts con-necting the cerebral cortex with the thalamus and with the lower le\els by wayof the crusta of the cerebral peiiuncle. Since the innumerable fibres which passto and from the thalamus along its ventro-lateral surface interlace, this surface iscovered b)- a distinct reticulated stratum, to which the name external medullarylamina is applied. Th
Human anatomy, including structure and development and practical considerations . between the thalamus and the more laterally placed lenticular 1 i20 HI MAN nucleus, and establisliL-s the iniijortaiit ])athuay iransinitlini^ the filjre-tracts con-necting the cerebral cortex with the thalamus and with the lower le\els by wayof the crusta of the cerebral peiiuncle. Since the innumerable fibres which passto and from the thalamus along its ventro-lateral surface interlace, this surface iscovered b)- a distinct reticulated stratum, to which the name external medullarylamina is applied. The ventral surface is also attached, but instead <;f beingunited with the internal capsule, as is the lateral, it rests upon and is intimatelyblended with the upward prolongation of the tegmental ])ortion of the cerebralpeduncle, here known as the subthalamic tegmental region, presently to bedescribed (page 1127). I^k;. 967. Corpus callosuni Choroid plexus Fornix Tffiuia thalami Middle conunissitre Third ventricle Mammillo-thalamic tract Manimillary body Caudate nucleus Thalamus,mesial nucleus nucleus Lenticular inicleus Suhtlialamicinicleus Optic tract Tail of caudate nucleusInferior horn oflateral ventricle Tuber cinereum ilippocampus. cut oV)li(nicl\Crusta of cerebral peduncle Frontal section of brain passinjj through llialaini, middle commissure and mammillar\- bodies. Structure of the Thalamus.—Although composed chiefly of gray matter,the thalamus is jjartially surrounded and penetrated by tracts of white matter. Inaddition to being invested on its superior and ventro-lateral surfaces by the stratumzonale and the external medullary lamina respectively, the general ganglionic massis subdivided by a vertical internal sheet of fibres, continuous with the stratum zonaleand known as the internal medullary lamina, into three fairly marked nuclei,the anterior, the mesial and the lateral ( Fig. 967). Of these the lateral nucleus ismuch the
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
