Column

(kolf-u?n) \_cohwina, a column]. A name given to several parts of the body that furnish support to surrounding parts, or that have the shape of pillars. C, Anterior, the layer of white matter in either half of the spinal cord included between the anterior horn and nerve-roots, and the anterior median fi ure. C, Anterolateral Ascending. See C. of Gowers. C. of Burdach. See C, Posteroexternal. C. of Clarke, a column of gray substance occupying the region to the outer and posterior side of the central canal of the spinal cord, at the inner part of the base of the posterior cornu. It contains fusiform cells, and is the trophic center for the direct cerebellar tract. C, Direct Cerebellar, in the spinal cord, is situated outside of the lateral pyramidal tract. C. of Goll, the posteromedian column of the spinal cord. C, Gowers’, in the spinal cord, a group of fibers lying in front of the direct cerebellar tract and reaching around upon the periphery of the anterior pyramidal tract. C, Lateral, the layer of white matter in either half of the spinal cord included between the posterior horn and nerve-roots, and the anterior horn and nerve-roots. C. of Morgagni, vertical folds of the rectal mucous membrane seen at the point of union of the latter with the skin of the anus. C, Posterior, a collection of white matter situated in the spinal cord on either side between the posterior horns and posterior nerve-roots, and the posterior median fi ure. C, Posteroexternal, the outer wider division of the posterior column of the cord; the column of Burdach. C, Posteromedian, the median division of the posterior column of the cord; the column of Goll. C. of Spitzka-Li auer, in the spinal cord, a group of nerve fibers lying just in front of and just behind the posterior horns. C, Posterovesicular. See Column of Clark. C. of Turck, the anterior or direct pyramidal tract. C. of the External Ring, the free borders of the aponeurosis of the external oblique muscle, ring. forming the edges of the external abdominal 201