GYRUS

Pronunciation (US): (GB):

Irregular inflected form: gyri

I. (noun)

Sense 1

Meaning:

A convex fold or elevation in the surface of the brain

Synonyms:

convolution; gyrus

Classified under:

Nouns denoting body parts

Hypernyms ("gyrus" is a kind of...):

anatomical structure; bodily structure; body structure; complex body part; structure (a particular complex anatomical part of a living thing and its construction and arrangement)

Hyponyms (each of the following is a kind of "gyrus"):

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)

central gyrus (either of two gyri on either side of the central sulcus)

Holonyms ("gyrus" is a part of...):

cerebrum (anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans)

Credits

Context examples:

This area contains mostly mossy cells that receive inputs from the dentate gyrus and pyramidal cells in the CA3 region and also projects back to the dentate gyrus.

(CA4 Field of the Cornu Ammonis, NCI Thesaurus)

The blood vessel that receives deoxygenated blood from the insula and gyri and drains into the basal vein of Rosenthal deep in the lateral sulcus.

(Deep Middle Cerebral Vein, NCI Thesaurus)

A gyrus on the outer surface of the left frontal lobe of the cerebrum located between the inferior frontal sulcus and the fissure of Sylvius that is involved in response inhibition.

(Left Inferior Frontal Convolution, NCI Thesaurus)

A pathway of fibers originating in the lateral part of the entorhinal area, perforating the subiculum of the hippocampus, and running into the stratum moleculare of the hippocampus, where these fibers synapse with others that go to the dentate gyrus.

(Perforant Pathway, NLM, Medical Subject Headings)

The longer vertical portion of the parieto-occipital fissure, a deep groove, on the medial surface of the cerebral cortex extending from the hippocampal gyrus and separating the precuneus and cuneus as well as the occipital and parietal lobes.

(Internal Parieto-Occipital Fissure, NCI Thesaurus)

A gyrus or ridge in the parietal lobe surrounded by the ascending and horizontal sections of the intra-parietal sulcus, the horizontal section of the fissure of Sylvius and the edge of the posterior parietal lobe.

(Inferior Parietal Convolution, NCI Thesaurus)

The third of four regions in the cornu ammonis of the hippocampus which receives inputs from mossy fibers originating from the granule cells in the dentate gyrus and from inputs along the perforant path originating in layers II and III within the entorhinal cortex.

(CA3 Field of the Cornu Ammonis, NCI Thesaurus)

A shallow groove between the dentate gyrus and the parahippocampal gyrus; the remains of a fissure extending deep into the hippocampus between Ammon's horn and the dentate gyrus which becomes obliterated during foetal development.

(Hippocampal Fissure, NCI Thesaurus)