The torus semicircularis in a gekkonid lizard

Journal of Morphology
Michael C Kennedy, R H Browner

Abstract

The cytoarchitecture and neuromorphology of the torus semicircularis in the tokay gecko, Gekko gecko, were examined in Nissl-stained, fiber-stained, and Golgi-impregnated tissues. From a superficial position, the torus semicircularis extends rostrally under the caudal half of the optic tectum. Caudally, the two tori abut upon one another; rostrally, they diverge. The torus semicircularis consists of central, laminar, and superficial nuclei. The central nucleus consists of fusiform, spherical and triangular neurons. Their dendrites are highly branched, with numerous dendritic spines, and are oriented mediolaterally, dorsoventrally, and rostrocaudally. Fusiform and spherical neurons display two dendritic patterns: "single axis," ramifying in one axis, and "dual axis," exhibiting higher-order branches perpendicular to the primary dendrites. Triangular neurons exhibit a "radiate" dendritic pattern. In the rostral half of the torus semicircularis, the laminar nucleus caps the central nucleus. The laminar nucleus encircles the central nucleus in the caudal torus semicircularis. The neurons of the laminar nucleus have dendritic arrays oriented parallel to the border of the central nucleus. These dendrites exhibit a paucity of dendriti...Continue Reading

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Citations

Jun 1, 1984·Journal of Morphology·Robert H Browner, Alice M Baruch
Jan 22, 2008·Anatomia, histologia, embryologia·A PironeO Fabiani
Jul 1, 2010·The Journal of Comparative Neurology·Kai YanCatherine E Carr
Apr 1, 1992·Brain Research Bulletin·M I CuadradoG Tramu
Jul 28, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Andrea PironeOrtenzio Fabiani

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