gyrus

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gyrus

[′jī·rəs]
(anatomy)
One of the convolutions (ridges) on the surface of the cerebrum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Insular cortex through interconnection with cingulate gyrus, orbitofrontal cortex, and parahippocampal gyrus (paralimbic areas) is believed to be involved in consciousness and plays a role in diverse functions including perception, motor control, self-awareness, social cognition, cognitive functioning, and interpersonal experience [107].
Compared to 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.
Mesulam et al (2009) Changes in temporal gyrus, fusiform gyrus and parahippocampal gyrus. Everything in the left hemisphere.
That's because the control group showed a similar degree of improvement in ADHD symptoms immediately after learning to upregulate the left parahippocampal gyrus, although their scores did backslide modestly during 11 months of follow-up, while the IFC group continued to improve.
In this study, regression analysis of group asymmetry indices demonstrated a more pronounced decreasing trend from baseline to follow-up visits in MCI converters, compared with nonconverters, in the language-related and memory-related cortical regions, including the banks of the superior temporal sulcus, caudal middle frontal gyrus, inferior parietal lobule, pars triangularis, entorhinal cortex, and parahippocampal gyrus. The observation is consistent with the common understanding that AD is characterized by progressively worsening deficits in language [32] and memory [33].
In addition, reduced GMV in the bilateral hippocampus and parahippocampal gyrus of DMN has been observed in a voxel-based morphometry study [12].
Abbreviations: alv, alveus; CA1-CA4, hippocampal sectors CA 1 to 4; cp, choroid plexus; cs, collateral sulcus; Fd, fascia dentata (dentate gyrus); Fg, fusiform gyrus; fmb, fimbria; Ins, insula; Itc, inferior temporal cortex; lv, lateral ventricle; or, optic radiations; pc, posterior commissure; pca, posterior cerebral artery; Phg, parahippocampal gyrus; Post Thal, posterior thalamus (pulvinar); PreS, presubiculum; Sub, subiculum; TCd, tail of the caudate nucleus (H&E, original magnifications X400 [B] and X100 [E]; TDP-43, original magnifications X400 [C, D, F, G, I] and X600 [H]; [beta] amyloid, original magnification X100 [J]).
Studies with psilocybin and LSD also show that these drugs produce their effects by modulating brain structures involved in emotional processing and in memory and self-awareness, such as the parahippocampal gyrus, visual and frontal cortices, ACC and PCC, insula and amygdala (15,21,25,26,30,31).
Six neuroanatomical loci were selected as points of measurement wherein the needle electrode was inserted directly: the amygdala (by way of the uncus), middle frontal gyrus, orbital frontal gyrus, occipital pole, superior parietal lobule, and the parahippocampal gyrus. Both the right and left hemispheric structural equivalents were probed.
Parahippocampal gyrus 37 R Culmen, anterior cerebellum R Fusiform gyrus 37 R Middle frontal gyrus 46 R Claustrum R Middle frontal gyrus 32 L Inferior occipital gyrus 19 R Parahippocampal gyrus 36 L Parahippocampal gyrus 37 L Inferior frontal gyrus 9 L Middle frontal gyrus 6 R Insula 13 L Inferior frontal gyrus 9 R Precuneus 7 R Parahippocampal gyrus 27 R Amygdala R Inferior occipital gyrus 19 L Middle occipital gyrus 18 L Lingual gyrus 18 R Lingual gyrus 18 L Inferior occipital gyrus 18 R Anterior cingulate cortex 32 L Anterior cingulate cortex R Parahippocampal gyrus 27 L Precentral gyrus 4 L Amygdala L Amygdala L Table 2: Comparative analysis of the six reviewed models.
The structures that generate "emotionally driven" laughter movement are the amygdala, fusiform gyrus, parahippocampal gyrus, thalamus, hypothalamus, subthalamic regions and the dorsal tegmental brainstem (9).
Brain parts that help in learning languages include the inferior frontal gyrus, the middle temporal gyrus, and the parahippocampal gyrus.