Carpenter's principles of human physiology . nd presents at its upper and median part a swelling named the olive, which encloses a large grey motornucleus (Fig. 212, o g). The upward continuation of this funiculus divides,while passing through the Pons Varolii, into two bands, one of which pro-ceeds upwards and forwards as a part of the motor tract (m t) of the CrusCerebri, whilst the other (o) proceeds upwards and backwards to reach theCorpora Quadrigemina (c, d). The Olivary columns are continuous inferiorlywith the antero-lateral columns of the Spinal Cord. The vesicular nucleus ofthe olive
Carpenter's principles of human physiology . nd presents at its upper and median part a swelling named the olive, which encloses a large grey motornucleus (Fig. 212, o g). The upward continuation of this funiculus divides,while passing through the Pons Varolii, into two bands, one of which pro-ceeds upwards and forwards as a part of the motor tract (m t) of the CrusCerebri, whilst the other (o) proceeds upwards and backwards to reach theCorpora Quadrigemina (c, d). The Olivary columns are continuous inferiorlywith the antero-lateral columns of the Spinal Cord. The vesicular nucleus ofthe olive, which is known as the * Corpus dentatum,1 and which appears firstamongst the network of fibres into which the anterior cornu is resolved, andthe outer portion of the anterior column, seems to be intimately connected * Eosentbal, Ein Beitrag zur Encephalotomie, Weimar, 1815. Keid, Edinb. Surg. Jouvn., Jan. 1841 ; and Physiol., Pathol., and Anat. Eesearches, chap. Phil. Trans., 1858, p. 238. See also Meynert, op. eit.; p. STRUCTURE OF THE MEDULLA OBLONGATA. 575 with all the surrounding parts of the Medulla, chiefly through the arciformsystem, which will presently be described; and Lockhart Clarke, thoughhe was never able to trace any immediate connection between the cells ofthe nuclear laminae and the roots of the nerves—even in the case of the hypo-glossal nerves, which pass directly through them—yet was inclined to regardthem as the co-ordinating centres for the different ganglia or nuclei of theMedulla Oblongata.* Schroeder v. d. Kolk is disposed from many considera-tions to regard these bodies as the nervous centres on which the symmetricalmovements required in speech or the articulation of the voice are —The lateral columns (Z c, Fig. 211), Faisceaux intermediaries ofLonget, decussate below with the anterior pyramids. Ascending, they assumethe form of triangular columns; the apex of each appears at the surface, whilstthe base
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectphysiology, bookyear1
