gyrus

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Any of the prominent, rounded, elevated convolutions on the surfaces of the cerebral hemispheres.

[Latin g[ymacr]rus, circle. See gyre.]

An elevated ridge of tissue on the surface of the cerebral hemispheres of the brain.

Pl. gyri [L.] one of the many convolutions of the surface of the brain caused by infolding of the cortex (gyri cerebri), separated by fissures or sulci. These are not defined here. The list usually includes: g. ambiens, gyri breves insulae, g. callosus, g. centrifugales, g. centripetales, gyri cerebri, g. fasciolaris, g. lunaris and the cingulate, coronal, dentate, ectomarginal, ectosylvian, genual, marginal, occipital, parahippocampal, postcruciate, postsplenial, precruciate, prorean, splenial, suprasplenial and sylvian gyri.

• cerebral gyri, gyri cerebri — the tortuous elevations (convolutions) on the surface of the cerebral hemisphere, caused by infolding of the cortex and separated by fissures or sulci.

For the video game, see Gyruss.

Gray's FIG. 726– Lateral surface of left cerebral hemisphere, viewed from the side.

Gray's Fig. 727 - Medial surface of left cerebral hemisphere.

A gyrus (pl. gyri) is a ridge on the cerebral cortex. It is generally surrounded by one or more sulci.

Notable gyri

• Fornicate gyrus
• Superior frontal gyrus, lat. gyrus frontalis superior
• Middle frontal gyrus, lat. gyrus frontalis medius
• Inferior frontal gyrus, lat. gyrus frontalis inferior with 3 parts: pars opercularis, pars triangularis, and pars orbitalis
• Superior temporal gyrus, lat. gyrus temporalis superior

Middle temporal gyrus, lat. gyrus temporalis medius

Inferior temporal gyrus, lat. gyrus temporalis inferior

• Fusiform gyrus, lat. gyrus occipitotemporalis medius
• Parahippocampal gyrus, lat. gyrus parahippocampalis
• Transverse temporal gyrus

Precentral gyrus, lat. gyrus praecentralis

• Postcentral gyrus, lat. gyrus postcentralis

Supramarginal gyrus, lat. gyrus supramarginalis

Angular gyrus, lat. gyrus angularis

• Cingulate gyrus lat. gyrus cinguli
• Dentate gyruslat. gyrus dentatus

Cuneus

Lingula lat. gyrus lingualis

See also

• Lissencephaly

External links

• Visual explanation of gyri, sulci, and fissures

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