postcentral gyrus

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Related to postcentral gyrus: precentral gyrus, Prefrontal cortex, parietal lobe


 [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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

post·cen·tral gy·rus

the anterior convolution of the parietal lobe, bounded in front by the central sulcus (fissure of Rolando) and posteriorly by the postcentral and interparietal sulci.
Farlex Partner Medical Dictionary © Farlex 2012

post·cen·tral gy·rus

(pōst-sen'trăl jī'rŭs) [TA]
The anterior convolution of the parietal lobe, bounded in front by the central sulcus (fissure of Rolando) and posteriorly by the interparietal sulcus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
In the HT7 stimulation, activated regions include bilateral postcentral gyrus, inferior parietal lobule, inferior frontal gyrus, claustrum, insula, and anterior lobe of the cerebellum, as well as left posterior lobe of the cerebellum.
The most commonly selected brain region in our method is postcentral gyrus, which is the primary somatosensory cortex [4].
Five clusters were found with increased brain activation in CRT patients from pre- to post-training, compared with non-CRT patients [Table 3] and [Figure 3],[sup][15],[24],[25],[26],[27],[31] (1) the right middle frontal gyrus (568 mm [sup]3, BA6); (2) the right postcentral gyrus (552 mm [sup]3, BA2); (3) the left medial frontal gyrus (440 mm [sup]3, BA6); (4) the right inferior parietal lobule (280 mm [sup]3, BA40); (5) the left middle frontal gyrus (208 mm [sup]3, BA9).{Table 3}{Figure 3}
Reversed asymmetry was found for the postcentral gyrus. Increased asymmetry was found for the hippocampus and the parahippocampal gyrus.
Many brain regions were activated, including somatosensory cortex (such as the superior parietal lobule and postcentral gyrus), limbic-paralimbic system (such as the calcarine gyrus, precuneus, cingulate cortex, and parahippocampal gyrus), visual-related cortex (such as the fusiform and occipital gyri), pain regions (such as basal ganglia), and the cerebellum.
Their score on the Beck Depression Inventory also improved in correlation with decreased activation in the superior frontal gyrus and postcentral gyrus. Dr.
Compared to the control group, the dancer group showed that the seed belonging to the inferior frontal gyrus had significantly lower functional connectivity to the bilateral insula, right inferior temporal gyrus, bilateral precentral gyrus, left postcentral gyrus, left middle temporal gyrus, left fusiform gyrus, and right cerebellum (Table 3, Figure 2).
Component 15 from the SBM analysis showed differences in the brains of schizophrenic and healthy volunteers in the middle frontal gyrus, precentral gyrus, subgyrus, postcentral gyrus, superior frontal gyrus, medial frontal gyrus, cingulate gyrus, and superior temporal gyrus.
Compared to the baseline in the 2 years follow-up, the patients with PD presented with increased fALFF values in the right middle temporal gyrus and right middle occipital gyrus while also having decreased fALFF values in the right cerebellum, right thalamus, right striatum, left superior parietal lobule, left IPL, left precentral gyrus, and left postcentral gyrus (P < 0.01, after correction with AlphaSim).
Brain regions MNI coordinates BA (x, y, z) Middle frontal -36 47 22 10 gyrus ACC -3 2 46 32/24 Superior temporal 54 8 -2 22/38 gyrus Inferior parietal -57 -34 25 40 lobule Precentral gyrus 48 0 9 44 Postcentral gyrus -48 -16 22 3 Thalamus 3 -9 6 -- Putamen -21 13 4 -- Cerebellum 30 -70 -23 -- Brain regions L/R Voxels T values Middle frontal L 25 4.889 gyrus ACC L 22 4.9336 Superior temporal R 115 6.738 gyrus Inferior parietal R 50 4.928 lobule Precentral gyrus R 20 8.8206 Postcentral gyrus L 25 5.022 Thalamus R 16 6.115 Putamen L 20 5.8152 Cerebellum R 47 6.2835 Table 2: Activations for SD group during acupuncturing on SP6 compared with a resting baseline are shown (P < 0.001, cluster >10 voxels, uncorrected).
[4] Luo and colleagues [5] reported that patients with OCD had a greater volume of white matter in the right precentral gyrus, the right postcentral gyrus, the bilateral precuneus, and the left middle occipital gyrus than control subjects; they also had a smaller volume of white matter in the bilateral superior frontal gyrus, the left postcentral gyrus, the left parahippocampal gyrus/ corpus callosum, and the right inferior parietal lobule.
In the perceptual network, SMN includes pre- and postcentral gyrus, the primary sensory-motor cortices, and the supplementary motor area; AN primarily encompasses the bilateral middle and superior temporal gyrus, Heschl gyrus, and temporal pole; VN includes the inferior, middle, and superior occipital gyrus and the temporal-occipital regions along with superior parietal gyrus [25].