Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to gyri: neuron, basal ganglia


Plural of gyrus.


(ˈdʒaɪ rəs)

n., pl. gy•ri (ˈdʒaɪ raɪ)
a convoluted fold of the brain.
[1835–45; < Latin gȳrus; see gyre]
References in periodicals archive ?
One is in the speech-recognition and language-association areas of the brain's left hemisphere, in the superior and middle temporal gyri.
This results in transmission of input from both ears to the auditory cortex in both superior temporal gyri.
Kanwisher's smooth, bald head then becomes a canvas for graduate student and artist Rosa Lafer-Sousa, who meticulously draws in the brain's wrinkles--the sulci and the gyri that give rise to thoughts, memories and behaviors.
This lesion pattern was present throughout the cerebral cortex, except for the hippocampal formation and lower temporal gyri.
In addition, "two cortical regions connected via the arcuate fasciculus exhibited increased thickness: the right middle temporal and precentral gyri," they noted.
This could be due to reduced D2 receptor availability or expression, or impaired dopamine metabolism in cingulate gyri, frontal lobes, and orbitofrontal cortex.
Relative to comparison subjects, individuals exposed to childhood maltreatment exhibited significantly smaller grey matter volumes: in the right orbitofrontal/superior temporal gyrus extending to the amygdala, insula, and parahippocampal and middle temporal gyri and in the left inferior frontal and postcentral gyri.
dorsolateral prefrontal cortex, fusiform gyri, and posterior parietal cortex).
Specifically, males on average had larger volumes and higher tissue densities in the left amygdala, hippocampus, insular cortex, putamen; higher densities in the right VI lobe of the cerebellum and in the left claustrum; and larger volumes in the bilateral anterior parahippocampal gyri, posterior cingulate gyri, precuneus, temporal poles, and cerebellum, areas in the left posterior and anterior cingulate gyri, and in the right amygdala, hippocampus, and putamen.
By contrast, females on average had higher density in the left frontal pole, and larger volumes in the right frontal pole, inferior and middle frontal gyri, pars triangularis, planum temporale/parietal operculum, anterior cingulate gyrus, insular cortex, and Heschl's gyrus; bilateral thalami and precuneus; the left parahippocampal gyrus, and lateral occipital cortex.
Montreal), but focuses strictly on the anatomical characteristics--the morphology, cyto-architectures, and connections--of the core language regions of the cerebral cortex, the sulci and gyri.
A brain imaging study found that the areas of the brain most vulnerable to the toxic effects of mercury are the calcarine region, pre- and postcentral gyri, and the temporal transverse gyrus (Taber & Hurley, 2008).