postcentral gyrus

gyrus /gy·rus/ (ji´rus) pl. gy´ri   [L.] cerebral g.

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angular gyrus  one arching over the superior temporal sulcus, continuous with the middle temporal gyrus.

gy´ri bre´ves in´sulae  the short, rostrally placed gyri on the surface of the insula.

Broca's gyrus  see under convolution.

central gyrus, anterior  precentral g.

central gyrus, posterior  postcentral g.

cerebral gyrus  any of the tortuous convolutions on the surface of the cerebral hemispheres, caused by infolding of the cortex and separated by fissures or sulci.

cingulate gyrus  an arch-shaped convolution just above the corpus callosum.

gyrus descen´dens  the raised area posterior to the superior and inferior occipital gyri and anterior to the lunate sulcus when that is present.

frontal gyrus  any of four gyri (inferior, medial, middle, and superior) of the frontal lobe.

fusiform gyrus  one on the inferior surface of the hemisphere between the inferior temporal and parahippocampal gyri, consisting of a lateral (lateral occipitotemporal g.) and a medial (medial occipitotemporal g.) part.

gyrus geni´culi  a vestigial gyrus at the anterior end of the corpus callosum.

hippocampal gyrus  parahippocampal g.

infracalcarine gyrus  lingual g.

interlocking gyri  small gyri in the opposing walls of the central sulcus that interlock with each other like gears.

lingual gyrus  one on the occipital lobe, forming the inferior lip of the calcarine sulcus and, with the cuneus, the visual cortex.

gyrus lon´gus in´sulae  the long, occipitally directed gyrus on the surface of the insula.

occipital gyrus  either of the two (superior and inferior) gyri of the occipital lobe.

occipitotemporal gyrus, lateral  the lateral portion of the fusiform gyrus.

occipitotemporal gyrus, medial  the medial portion of the fusiform gyrus.

orbital gyri  irregular gyri on the orbital surface of the frontal lobe.

parahippocampal gyrus  a convolution on the inferior surface of each cerebral hemisphere, lying between the hippocampal and collateral sulci.

paraterminal gyrus  a thin sheet of gray substance in front of and ventral to the genu of the corpus callosum.

postcentral gyrus  the convolution of the frontal lobe between the postcentral and central sulci; the primary sensory area of the cerebral cortex.

precentral gyrus  the convolution of the frontal lobe between the precentral and central sulci; the primary motor area of the cerebral cortex.

gyrus rec´tus  one on the orbital surface of the frontal lobe.

supramarginal gyrus  that part of the inferior parietal convolution that curves around the upper end of the sylvian fissure.

temporal gyrus  any of the gyri of the temporal lobe, including the inferior, middle, superior, and transverse temporal gyri; the more prominent of the latter (anterior transverse temporal g.), when two exist, represents the cortical center for hearing.

gy´ri transiti´vi ce´rebri  various small folds on the cerebral surface that are too inconstant to bear individual names.

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postcentral gyrus

n.

The anterior convolution of the parietal lobe, bounded in front by the central sulcus and in back by the interparietal sulcus.

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postcentral gyrus

[-sen′trəl]

Etymology: L, post, after; Gk, kentron, center, gyros, turn

a convolution of the brain immediately posterior to the central sulcus of the cerebrum. It is the location of the sensory strip for the contralateral side of the body.