frontal gyrus


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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.

frontal gyrus

n.
1. A broad convolution on the convexity of the frontal lobe of the cerebrum between the inferior frontal sulcus and the sylvian fissure, divided by branches of the sylvian fissure into three parts; inferior frontal gyrus.
2. A convolution on the convexity of each frontal lobe of the cerebrum running from front to back between the superior and inferior frontal sulci; middle frontal gyrus.
3. A broad convolution running from front to back on the medial edges of the convex surface and of each frontal lobe; superior frontal gyrus.
References in periodicals archive ?
Instead, peak voxel activations were found in the left inferior parietal lobule (Brodmann Area 40), as well as the superior portion of the right middle frontal gyrus (Brodmann Area 8) for this contrast.
Hees et at (2014) Superior frontal gyrus, angular gyrus and superior left temporal gyrus activated without intervention.
Increased intrinsic activity in postcentral gyrus, superior frontal gyrus, left inferior frontal gyrus, and cerebellum has been observed for elite karate players as summarized in Table 4.
Moreover, all three groups activated the bilateral (anterior) insula and the superior frontal gyrus, which have been shown, in past fMRI studies using the BART, to be activated during the Inflation event [29, 36].
[sup.18]F-FDG: fludeoxyglucose F 18; AD: Alzheimer's disease; CN: cognitively normal; STG: superior temporal gyrus; BA: Brodmann area; MTG: middle temporal gyrus; ITG: inferior temporal cortex; PCC: posterior cingulate cortex; MFG: medial frontal gyrus; ACC: anterior cingulate cortex; SPL: superior parietal lobe; IFG: inferior frontal gyrus.
Previous neuroimaging studies, focusing on functional changes associated with the impaired recognition of emotions in PD patients, revealed that the impaired emotional facial recognition network was characterized by a decreased metabolism within the bilateral posterior cingulate gyrus (BA 31), right superior frontal gyrus (BAs 10, 9, and 6), and left superior frontal gyrus (BAs 10 and 11) [208].
VMHC: voxel-mirrored homotopic connectivity; HPs: hyperthyroid patients; HCs: healthy controls; MeFG: medial frontal gyrus; AUC: area under the curve.
Reduced cortical thickness on right middle frontal gyrus, right superior frontal, and right lingual.
Where the major source of the variance was due to a difference between the right amygdala and right orbital frontal gyrus (p<0.05).
CE is modulated by ventromedial PC whereas AE involves mid cingulate cortex, anterior insula, inferior frontal gyrus. 12 Lesions of the amygdala and inferior frontal cortex disrupt AE, in contrast lesions of the medial PC disturb CE.
Consistently, a VBM study by Park and Jeong (2015) confirmed white matter increases for OCD in extended brain regions such as the right dorsolateral prefrontal cortex, middle frontal gyrus, precuneus, and inferior parietal lobe.
IFG: inferior frontal gyrus; IPL: inferior parietal lobule; aMCC: anterior midcingulate cortex; pgACC: pregenual anterior cingulate cortex; OFC: orbitofrontal cortex.