Textbook of normal histology: including an account of the development of the tissues and of the organs . tter ; /;, median and antero-lateral groups ofganglion-cells ; i, central canal; k, I, gray and white commissures ; A, L, P, anterior, lateral, andposterior columns ; G, column of Goll; B, column of Burdach. sure and the anterior root is the anterior column; the large areabounded by the anterior root, the gray matter, and the posteriorroot forms the lateral column; while the field included betweenthe posterior root and the posterior median septum corresponds tothe posterior column. Since th
Textbook of normal histology: including an account of the development of the tissues and of the organs . tter ; /;, median and antero-lateral groups ofganglion-cells ; i, central canal; k, I, gray and white commissures ; A, L, P, anterior, lateral, andposterior columns ; G, column of Goll; B, column of Burdach. sure and the anterior root is the anterior column; the large areabounded by the anterior root, the gray matter, and the posteriorroot forms the lateral column; while the field included betweenthe posterior root and the posterior median septum corresponds tothe posterior column. Since the first two divisions are veryclosely associated both as to their position and as to their constit-uents, they are very frequently regarded as a single column, theantero-lateral. Each of these principal segments is subdividedinto secondary tracts, distinguished by names indicating the gen-eral course or the destination of the component nerve-fibres. 286 NORMAL HISTOLOGY. The anterior column includes two tracts : the direct pyram-idal tract (Turcfrs column), next the median fissure, and the Fig. Diagram showing principal divisions of white matter of spinal cord : A, P, anterior andposterior horns of gray matter ; DP, direct pyramidal tract; GB, anterior ground-bundle ;CP, crossed pyramidal tract; DC, direct cerebellar bundle; GT, Gowerss or ascendingantero-lateral tract; DA L, descending antero-lateral patch ; ML, mixed lateral tract;BG, column of Burdach (fasciculus cuneatus) and column of Goll (fasciculus gracilis). anterior ground-bundle, or anterior radicular zone, which iscontinuous with the adjoining area of the lateral region. The lateral column contains a number of secondary tracts, twoof which are especially prominent, the crossed pyramidal and thedirect cerebellar. The latter lies as a narrow zone at the marginof the cord, and extends from the posterior root about half-way tothe anterior root. The crossed pyramidal tract appears as anoval area which lies next the
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
