. Elements of human physiology. Physiology. 626 PHYSIOLOGY most primitive part of the cerebral hemispheres. It does not act as the intermediary between the cortex and the lower parts of the brain, but its fibres run to lower levels in company with those from the cortex. It seems possible that it may under conditions carry out in a simple way the functions which, with more elaboration, need the co-operation of the Face Diagrammatic vertical section through brain showing course of pyramidal fibres. Cortex on which are situated the motor centres. Internal capsule. Caudate
. Elements of human physiology. Physiology. 626 PHYSIOLOGY most primitive part of the cerebral hemispheres. It does not act as the intermediary between the cortex and the lower parts of the brain, but its fibres run to lower levels in company with those from the cortex. It seems possible that it may under conditions carry out in a simple way the functions which, with more elaboration, need the co-operation of the Face Diagrammatic vertical section through brain showing course of pyramidal fibres. Cortex on which are situated the motor centres. Internal capsule. Caudate nucleus. Optic thalamus. Lenticular nucleus. D. Point of decus- sation of fibres to , facial nucleus. VII. Seventh nerve. P. Pyramids of medulla. Anterior pyramidal tract. Lp. Lateral pyramidal tract. Medulla oblongata. Spinal cord. Cbl. Cerebellum. The Comiecting Tracts of the Brain The tracts of the white matter of the brain may be divided into the longitudinal tracts which connect different levels of the brain with one another, and the commissural or transverse. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Starling, Ernest Henry, 1866-1927. Chicago : W. T. Keener
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