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decussation of pyramids |
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decussation of pyramids Etymology: L, decussare, to make a cross; Gk, pyramis the crossing of nerve fibers of the corticospinal motor tract at the ventral side on the lower portion of the medulla oblongata. decussation a crossing over; the intercrossing of fellow parts or structures especially in the form of a Y. decussation of pyramids the anterior part of the lower medulla oblongata in which some of the fibers of each pyramid intersect as they cross the midline and descend as the lateral corticospinal tracts. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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