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 ?
Second, pharmacological and non-pharmacological stimulation centered interventions in temporal gyrus, precuneus, cuneus and supramarginal gyrus. This could end up slowing the progression of impairment associated with Alzheimer's disease.
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. Others have interpreted this underactivation as reflecting a disconnection of posterior reading areas from other brain regions involved in reading.
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.
Abbreviations AO: Action observation MVF: Mirror visual feedback MNS: Mirror neuron system fMRI: Functional magnetic resonance imaging EEG: Electroencephalography CIMT: Constraint-induced movement training VR: Virtual reality IFG: Inferior frontal gyrus PMv: Ventral premotor cortex IPL: Inferior parietal lobule IPS: Intraparietal sulcus MT: Mirror therapy MEG: Magnetoencephalography PET: Positron emission tomography NIRS: Near-infrared spectrometry ERD: Event-related desynchronization DCM: Dynamic casual modelling PMC: Premotor cortex SMC: Sensorimotor cortex MI: Motor imagery STG: Superior temporal gyrus SMA: Supplementary motor area SMG: Supramarginal gyrus PCC: Posterior cingulate cortex MFG: Middle frontal gyrus.
Automated MRI measures of the same three areas identified in the first phase - entorhinal cortex, hippocampus, and supramarginal gyrus - discriminated individuals with mild cognitive impairment from normal elderly controls with 95 percent accuracy, and patients with Alzheimer's were discriminated from normal controls with 100 percent accuracy.
(38) aSMG l (supramarginal gyrus, anterior division left)
During left (corresponding to paretic) hand action observation, activity was again found in the left supramarginal gyrus, bilateral precentral gyri, bilateral superior parietal lobules, and bilateral occipital cortices (Figure 1; Supplementary Table 2).
For the left caudate (MNI coordinate: x = -10, y =12, and z = -5), patients showed increased FCs with the right inferior cerebellum and the left supramarginal gyrus and decreased FCs with the left orbital superior frontal lobe and the left paracentral lobule.
Age-adjusted perfusion value differences in the right hemisphere were significant in seven ROIs, all in the direction of higher perfusion for the patients: superior frontal gyrus, precentral gyrus, postcentral gyrus, superior parietal lobule, posterior supramarginal gyrus, superior lateral occipital cortex, and supplementary motor area (SMA).
Damage was most extensive in the parietal lobe, including nearly all of the left angular gyrus (90% damaged) and a large portion of the supramarginal gyrus (70% damaged), as well as portions of the left superior (49% damaged) and inferior parietal lobules (67% damaged).
Significant decreases in FA following SCI occurred in the left angular gyrus (AG), right cerebellar (CB), left precentral gyrus (PreCG), left lateral occipital region (LOC), left superior longitudinal fasciculus (SLF), left supramarginal gyrus (SMG), and left postcentral gyrus (PostCG).
[38] (10 mm sphere at MNI-coordinates x/y/z = -55/-22/41 comprising part of BA 1/2/3/4), as well as region-of-interest (ROI) analyses using six ROIs of (1) the left and right secondary somatosensory cortex (SII), (2) the left thalamus, (3) the left supramarginal gyrus, (4) the left insula cortex, (5) the right insula cortex, and (6) the right hippocampus (WFU PickAtlas version 1.2; [39-41]).