zonal layer of superior colliculus
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layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam … Medical dictionary
colliculus — A small elevation above the surrounding parts. [L. mound, dim. of collis, hill] c. of arytenoid cartilage [TA] the elevation on the anterolateral surface of the arytenoid cartilage above the triangular fovea. SYN: c. cartilaginis arytenoideae… … Medical dictionary
stratum zonale colliculi superioris — [TA] zonal layer of superior colliculus: the most external layer of the superior colliculus (Layer I), containing myelinated and unmyelinated fibers primarily from the occipital lobe … Medical dictionary
stratum griseum superficiale colliculi superioris — [TA] superficial gray layer of superior colliculus: a layer containing many small multipolar nerve cells which synapse with neurons from the overlying zonal layer and the underlying optic layer; it is Layer II of the colliculus. Called also s.… … Medical dictionary
Nucleus — 1) In cell biology, the structure that houses the chromosomes. 2) In neuroanatomy, a group of nerve cells. * * * 1. In cytology, typically a rounded or oval mass of protoplasm within the cytoplasm of a plant or animal cell; it is surrounded by a… … Medical dictionary
corticotectal tract external — a tract of efferent fibers from visual association areas of the cortex, running transversely into the zonal layer of the superior colliculus … Medical dictionary
