gyrus

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Related to Superior frontal gyrus: frontal sulcus, Middle frontal gyrus

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.]

gyrus

(ˈdʒaɪrəs)
n, pl gyri (ˈdʒaɪraɪ)
another name for convolution3
[C19: from Latin; see gyre]

gy•rus

(ˈdʒaɪ rəs)

n., pl. gy•ri (ˈdʒaɪ raɪ)
a convoluted fold of the brain.
[1835–45; < Latin gȳrus; see gyre]
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
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.
References in periodicals archive ?
Structural MRI revealed disease-related reductions in cortical thickness in the same regions: the inferior frontal cortex, anterior cingulate cortex, and superior frontal gyrus.
Some studies indicated reduced grey matter in the prefrontal cortex, left orbitofrontal gyrus, left superior frontal gyrus, and bilateral medial, and middle frontal gyrus of chronic schizophrenia [60-64].
Furthermore, the diabetes group had lower fMRI activation of the left inferior frontal gyrus (Brodmann area 13) in the 1-back versus 0-back (working memory) condition, and had less activation of the left middle frontal gyrus and the superior frontal gyrus in the 2-back versus 0-back comparison, they added.
Speaking: Areas of activation were observed bilaterally in the superior frontal gyrus (BA6), and the insula (BA13) and the inferior parietal lobule (BA47), the superior parietal lobule (BA7), the superior temporal gyrus (BA22) and the postcentral gyrus (BA43) of the left hemisphere, the superior temporal gyrus (BA 42, 38) and the precentral gyrus (BA6) of the right hemisphere.
In a postmortem study, Hof et al (7) found 7 patients schizophrenia had 28% fewer oligodendrocytes per section of the superior frontal gyrus and 27% less white matter compared with 7 age-matched controls (Figure 3, page 96).
Women in the chemotherapy group had decreased glucose metabolism in the superior frontal gyrus and in Broca's area in the dominant hemisphere and its contralateral counterpart, compared with the control group.

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