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Lissauer’s tract

Noun 1. A small strand situated in relation to the tip of the posterior column close to the entrance of the posterior nerve roots. ( 2. A slender column of white matter between the dorsal gray column and the periphery of the spinal cord. ( Syn: fasciculus of Lissauer, tract of Lissauer, dorsolateral fasciculus, dorsolateral tract, zone of Lissauer, posterolateral...

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Noun Literally means smooth brain. 1. A rare brain formation disorder caused by defective neuronal migration during the 12th to 24th weeks of gestation resulting in a lack of development of brain folds (gyri) and grooves (sulci). It is a form of cephalic disorder. Terms such as ‘agyria’ (no gyri) or ‘pachygyria’ (broad gyri) are used to describe the appearance of the surface of the brain. ( 2. A disorder characterized by smoothness (lack of folds and grooves) of the brain. ( 3. Condition in which the brain is smooth owing to failure of development of cerebral gyri. ( Word origin: From Greek lissos,...

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