. The brain as an organ of mind. ility, are fibreswhich suffice to connect the Corpus Striatum with theCerebellum through the intermediation of its * middlepeduncles. The deeper stratum (that is the upper andposterior parts of the Peduncles in the natural positionof the Brain), constituting what is known as the * Teg-mentum,^ is not so white in colour, and seems to bemainly composed of * ingoing fibres derived from theCord and Medulla. * The Crusta and Tegmentum, Broadbent says, canbe separated from each other for some distance upwards,as they spread out to form the fan-like expansion spokenof
. The brain as an organ of mind. ility, are fibreswhich suffice to connect the Corpus Striatum with theCerebellum through the intermediation of its * middlepeduncles. The deeper stratum (that is the upper andposterior parts of the Peduncles in the natural positionof the Brain), constituting what is known as the * Teg-mentum,^ is not so white in colour, and seems to bemainly composed of * ingoing fibres derived from theCord and Medulla. * The Crusta and Tegmentum, Broadbent says, canbe separated from each other for some distance upwards,as they spread out to form the fan-like expansion spokenof; but before they emerge from the central ganglia thefibres of one sink in between those of the other, and theybecome mixed together, so as to be no longer distinguish-able. * Its colour being due to the abundance of pioment granules contained within the large nerve cells of this region. Chap. XXIII ] OF THE HUMAN BRAIN. 437 a. Halation of the Cerebral Peduncles to the CentralGanglia : Thalami and Corpora Striata,—According to. Fig. 156.—Central Ganglia of the Brain, together with the Cerebellum and itsSuperior Peduncles. (Sappey, after Hirschfeld.) 1, Corpora quadrigemina;2, Valve of Vieussens; 3, superior Cerebellar Peduncles; 4, upper part of themiddle Cerebellar Peduncles ; 5, upper part of the Cerebral Peduncles ; 6, lateralgroove of the isthmus; 7, ribbon of Reil; 8, cord extending from the testis tothe internal geniculate body; 9, column of the Valve of Vieussens; 10, greylamella of the same ; 11, posterior fibres of the triangular bundle of the isthmus ;12, upper fibres of middle Cerebellar Peduncles ; 13, white centre of the Cerebellum ;14, grey rhomboidal nucleus of Cerebellum ; 15, posterior commissure of Cerebrum ;16, peduncles of the Pineal body; 17, Pineal body turned forwards so as to showlast two structures ; 18, posterior tubercles of the Thalami ; 19, anterior tubercles ofsame; 20, Tenia semicircularis ; 21, veins of the Corpus Striatum ; 22, anteriorpilla
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Keywords: ., bookcentury1, booksubjectbrain, booksubjectpsychologycomparative
