supramarginal gyrus


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Related to supramarginal gyrus: parahippocampal gyrus, Heschl's gyrus

gyrus

 [ji´rus] (pl. gy´ri) (L.)
one of the many convolutions of the surface of the cerebral hemispheres caused by infolding of the cortex, separated by fissures or sulci; called also cerebral gyrus.
angular gyrus one continuous anteriorly with the supramarginal gyrus.
annectent gyri various small folds on the cerebral surface that are too inconstant to bear specific names; called also gyri transitivi.
Broca's gyrus inferior frontal gyrus.
central gyrus, anterior precentral gyrus.
central gyrus, posterior postcentral gyrus.
cerebral gyrus gyrus.
Cerebral gyri. From Applegate, 1996.
cingulate gyrus (gyrus cin´guli) an arch-shaped convolution situated just above the corpus callosum.
frontal gyrus any of the three (inferior, middle, and superior) gyri 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 gyrus) and a medial (medial occipitotemporal gyrus) part.
hippocampal gyrus (gyrus hippocam´pi) one on the inferior surface of each cerebral hemisphere, lying between the hippocampal and collateral fissures; called also parahippocampal gyrus.
infracalcarine gyrus (lingual gyrus) one on the occipital lobe that forms the inferior lip of the calcerine sulcus and, together with the cuneus, the visual cortex.
marginal gyrus the middle frontal gyrus.
occipital gyrus any of the three (superior, middle, 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 hippocampal gyrus.
paraterminal gyrus a thin sheet of gray matter in front of and ventral to the genu of the corpus callosum.
postcentral gyrus the convolution of the frontal lobe immediately behind the central sulcus; the primary sensory area of the cerebral cortex; called also posterior central gyrus.
precentral gyrus the convolution of the frontal lobe immediately in front of the central sulcus; the primary motor area of the cerebral cortex; called also anterior central gyrus.
gyrus rec´tus a cerebral convolution on the orbital aspect of the frontal lobe.
supramarginal gyrus that part of the inferior parietal convolution which curves around the upper end of the fissure of Sylvius.
temporal gyrus any of the gyri of the temporal lobe, including inferior, middle, superior, and transverse temporal gyri; the more prominent of the latter (anterior transverse temporal gyrus) represents the cortical center for hearing.
gy´ri transiti´vi annectent gyri.
uncinate gyrus the uncus.

su·pra·mar·gin·al gy·rus

[TA]
a folded convolution capping the posterior extremity of the lateral (sylvian) sulcus; together with the angular gyrus, it forms the inferior parietal lobule.

su·pra·mar·gin·al gy·rus

(sū'pră-mahr'jin-ăl jī'rŭs) [TA]
A folded convolution capping the posterior extremity of the lateral (sylvian) sulcus; together with the angular gyrus, it forms the inferior half of the parietal lobe.

supramarginal gyrus

A V-shaped gyrus capping the posterior end of the Sylvian fissure in the parietal lobe of each cerebral hemisphere, just dorsal to the angular gyrus. The supramarginal gyrus plays a role in auditory comprehension.
See also: gyrus
References in periodicals archive ?
24] Recently, this research team [25] used an automated extraction method (which is more efficient that the ROI method) in patients with OCD and found decreased blood flow in the left inferior temporal lobe, supramarginal gyrus, transverse temporal gyrus, outer dorsal nuclei, outer posterior nucleus, intercalated nucleus, and increased blood flow in the left superior parietal lobule, and the dorsal thalamus.
As mentioned, some researchers have interpreted underactivation in the tempoparietal region as an underdeveloped or inefficient posterior reading network involving Wernicke's area, angular gyrus and supramarginal gyrus.
Paulesu, Frith and Frackowiak (1996) described a possible memory circuit that includes a phonological store, with the insula and the supramarginal gyrus involved in this circuit.
The researchers identified the unique area, called the anterior supramarginal gyrus (aSMG), through experiments in which 47 people and five rhesus monkeys watched videos of simple tools being used while their brains were scanned with fMRI.
Earlier pathological and imaging studies have found evidence of early Alzheimer's disease in these three areas - the hippocampus, entorhinal cortex and the supramarginal gyrus.