. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. NERVOUS CENTRES. (HUMAN ANATOMY. THE ENCEPHALON.) 683 emergence of the posterior roots of the spinal nerves, indicates the distinction of these two sets of fibres. If the posterior column be sepa- rated from the antero-lateral in the spinal cord, the separation may be easily carried upwards along this line, in a specimen which has been sufficiently hardened. From the description now given, the res- tiform bodies may be regarded as the con- necting fibres between the cerebellum and the spinal cord. They may be designated
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. NERVOUS CENTRES. (HUMAN ANATOMY. THE ENCEPHALON.) 683 emergence of the posterior roots of the spinal nerves, indicates the distinction of these two sets of fibres. If the posterior column be sepa- rated from the antero-lateral in the spinal cord, the separation may be easily carried upwards along this line, in a specimen which has been sufficiently hardened. From the description now given, the res- tiform bodies may be regarded as the con- necting fibres between the cerebellum and the spinal cord. They may be designated the ce- rebellar fibres of the medulla oblongata in con- tradistinction to the others, which are entirely connected with the mesocephale and with the cerebrum. Rolando describes the restiform body as con- taining grey matter—the grey tubercle of Ro- lando. This grey matter, however, may be more correctly regarded as a portion of the central nucleus of the medulla, from which very pro- bably some fibres of the restiform body emerge. The posterior pyramidal columns.—On each side of the posterior fissure we find a narrow column, sufficiently distinct from the restiform columns. These may be traced downwards through the cervical region of the cord, and even into the dorsal or lumbar, according to Foville. They taper gradually to a fine point, the situation of which varies in different sub- jects. Superiorly they form the inferior and part of the lateral boundary of the fourth ven- tricle. Their innermost fibres end abruptly in a blunt extremity, whilst the external ones are continued upwards on each side of the ven- tricle (fig. 386, Y). Olivary columns.—The oval bodies, which form a relief upon the surface of the medulla oblongata, have been long known by the names corpora olivaria, olivcc. They occupy the in- terval between the anterior pyramids and the restiform bodies, separated, however, from the latter by the narrow band of fibrous matter above described. The surface o
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