gyrus

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gy·rus

 (jī′rəs)
n. pl. gy·ri (-rī′)
A rounded ridge, as on the surfaces of the cerebral hemispheres.

[Latin gȳrus, circle; see gyre.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

gyrus

(ˈdʒaɪrəs)
n, pl gyri (ˈdʒaɪraɪ)
another name for convolution3
[C19: from Latin; see gyre]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

gy•rus

(ˈdʒaɪ rəs)

n., pl. gy•ri (ˈdʒaɪ raɪ)
a convoluted fold of the brain.
[1835–45; < Latin gȳrus; see gyre]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gyrus - a convex fold or elevation in the surface of the brain
anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"
frontal gyrus - any of the convolutions of the outer surface of the frontal lobe of the cerebrum
temporal gyrus - any of the convolutions of the outer surface of the temporal lobe of the cerebrum
parietal gyrus - any of the convolutions of the outer surface of the parietal lobe of the cerebrum
occipital gyrus - any of the convolutions of the outer surface of the occipital lobe of the cerebrum
cerebrum - anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans
central gyrus - either of two gyri on either side of the central sulcus
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

gy·rus

n. L. circunvolución, porción elevada de la corteza cerebral;
Broca's ______ de Broca, tercera, frontal inferior;
frontal, superior ______ frontal superior;
inferior, lateral occipital ______ occipital inferior lateral;
superior occipital ______ occipital superior.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
The limbic structures that are known to be related to tinnitus pathophysiology (amygdala, hippocampus, parahippocampal gyrus, insula, cingulum, and, for extension, nucleus accumbens) are components of three distinct but partially overlapping networks and corresponding clinical syndromes [83].
Compared with the normal elderlies, ReHo values decreased in aMCI patients in the left temporal lobe (middle temporal gyrus and inferior temporal gyrus), left parahippocampal gyrus, occipital lobe, lingual gyrus, precuneus, and other regions (P<0.05; Figure 3, Table 1), while ReHo values increased in the right side frontal lobe (inferior frontal gyrus), left superior temporal gyrus, precentral gyrus (frontal lobe), right thalamus, the left fusiform gyrus, and other regions (P<0.05; Figure 4, Table 2).
Katsel, Ph.D., from the Icahn School of Medicine at Mount Sinai in New York City, and colleagues examined IRSP and endothelial cell markers in the parahippocampal gyrus of 30 controls, 19 individuals with AD, and 34 individuals with AD and type 2 diabetes (T2D) who had been treated with anti-diabetic drugs.
Founded an atrophy in the left inferior temporal orders, upper half, the fusiform gyrus and the anterior parahippocampal gyrus.
The proof-of-concept study, published in Human Brain Mapping, included 31 boys with a DSM-5 diagnosis of ADHD, aged 12-17, who were randomized to fMRI-NF of the right IFC or, as a control condition, to fMRI-NF targeting the left parahippocampal gyrus. Two patients had the inattentive subtype of ADHD; the rest had the combined hyperactive/inattentive form.
In immunocompetent hosts, HSVE affects brain regions such as the limbic system, mesial temporal and frontal regions (amygdala, hippocampus, parahippocampal gyrus, temporal uncus, insula, and cingulate gyrus) earlier and most severely.
The MCI converters were observed with greater tissue shrinkage from the baseline scanning to follow-ups in the bilateral hippocampus, amygdala, parahippocampal gyrus, and entorhinal cortex, compared with nonconverters (Figure 4).
Regarding metabolic researches, patients with HPs were proven to have reduced glucose metabolism in the frontal lobe, temporal lobe, and parahippocampal gyrus compared with HCs, and the activation foci in the PCC and inferior parietal lobe were correlated with the severity of anxiety and depression [17, 18].
(42-47) Abbreviations: alv, alveus; CA1-CA4, hippocampal sectors CA 1 to 4; cf, choroidal fissure; cp, cerebral peduncle and choroid plexus; cs, collateral sulcus; Fd, fascia dentata (dentate gyrus); Fg, fusiform gyrus; hf, hippocampal fissure; Ins, insula; Lgn, lateral geniculate nucleus; lv, lateral ventricle; ot, optic tract; Phg, parahippocampal gyrus; PreS, presubiculum; Sub, subiculum; TCd, tail of the caudate nucleus (H&E, original magnifications X400 [B and E] and X200 [H]); TDP-43, original magnification X400 [C, D, F, and G]; [beta] amyloid, original magnification X200 [I]; tau, original magnification X200 [J]).
A SPECT study of acute administration with healthy volunteers showed that ayahuasca increased bilateral activation of the anterior insula/inferior frontal gyrus, right hemisphere activation of the anterior cingulate cortex (ACC) and frontomedial cortex, and left hemisphere activation of the amygdala and parahippocampal gyrus (32).
During strong geomagnetic storms there was a significant increase in power spectra within the 7.5 Hz to 14 Hz range within the right but not the left parahippocampal gyrus compared to days with relatively quiet geomagnetic activity.
The activated brain regions are also involved in processing early and intermediate visual information, such as the perception of objects (fusiform gyrus), scenes (parahippocampal gyrus), and the experience of emotion (the anterior insula) [25].