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semilunar fasciculus

 

Definition: a compact bundle composed of descending branches of posterior root fibers located near the border between the fasciculi gracilis and cuneatus of the cervical and thoracic spinal cord; it corresponds to the septomarginal fasciculus, Hoche tract, or oval area of Flechsig in the lumbar, and to the triangle of Philippe-Gombault in the sacral spinal segments; like these, it can be demonstrated only in cases of demyelination resulting from dorsal root lesions.

Synonym(s): fasciculus interfascicularisTA, interfascicular fasciculusTA, fasciculus semilunaris, comma bundle of Schultze, comma tract of Schultze

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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