TRACT

n. Tra2kt. Lat., tractus. Fr., tractus. cordon. Ger., Tractus. Balm. Strong. An extent of surface, usually of considerable length as compared with its breadth, fa, 48.] Aberrant t. of the lateral column. Of Monakow, a t. originating in the peripheral portion of the lateral column, lying against the corpus trapezoides, between the facial nucleus and the ascending root of the fifth nerve, and finally pa ing over into the fillet, [a, 34.] Anterior cerebro-pontine t. A t. of internal (mesial) fibres of the crus cerebri extending from the anterior part of the frontal lobe to the pons. \a. 34.] Anterior cortical t. Bundles of fibres from the cortex of the frontal lobe running to the ganglion cells of the pons varolii. [a, 34.] Anterior fundamental t. The anterior fundamental fasciculi of the anterior column of the spinal cord, [a, 34.] Anterior pyramidal t. The longitudinal bundles of nerve-fibres in the ventral half of the pons which represent the prolongation of the anterior pyramids of the medulla oblong at a. [I, 29 (K).] Anterolateral descending t. A few long fibres, scattered in the anterior and lateral ground bundles of E, he; Ea, ell; G, go; I, die; Is, in; N, in; Na, tank; [s. 636]