precentral gyrus


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Related to precentral gyrus: postcentral gyrus

precentral gyrus

[′prē¦sen·trəl ′jī·rəs]
(anatomy)
The cerebral convolution that lies between the precentral sulcus and the central sulcus and extends from the superomedial border of the hemisphere to the posterior ramus of the lateral sulcus.
References in periodicals archive ?
In our study, Joint-Source 15 from the SBM analysis showed differences in the brains of schizophrenic and healthy volunteers in the middle frontal gyrus, precentral gyrus, subgyrus, postcentral gyrus, superior frontal gyrus, medial frontal gyrus, cingulate gyrus, and superior temporal gyrus.
Number of subjects with damage to precentral gyrus in relation to motor grade.
The face is represented in the first one third of the lateral precentral gyrus, the upper extremity (arm, forearm and hand especially), is represented in the second third of the lateral precentral gyrus, and the trunk is represented in the third third (medial) of the precentral gyrus; the hip is represented in the place where precentral gyrus is continuing with paracentral gyrus and the lower limb (thigh, leg and foot), is represented in anterior paracentral gyrus (fig.
Abstinent users only demonstrated greater response than recent users in the right precentral gyrus, yet the mechanism behind this group difference is unclear.
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.
And the hubs identified by both b ( i ) and S ( i ) in HCs were the left and right precentral gyrus, left and right calcarine fissure and surrounding cortex, left and right insula and left median cingulate and paracingulate gyri.
They found that the 'small world' property of the brain network of patients with schizophrenia was abnormal: (a) compared to normal brains the characteristic path length and the clustering coefficient increased; (b) the nodes in some brain areas had decreased centrality and thinner cortices (especially the left parahippocampal gyrus, inferior temporal gyrus, angular gyrus, and right superior frontal gyrus, which are part of the default network); and (c) the nodes in other brain areas had increased centrality, including nodes in the primary cortex (bilateral precuneous, left precentral gyrus, postcentral gyrus, and right Heschl gyrus) and the paralymbic system (bilateral orbital frontal gyrus, temporal pole, right cingulate tract, and inferior parietal gyrus).
Further, a study using near-infrared spectroscopy (NIRS) found increased concentrations of oxygenated hemoglobin (oxy-Hb) in regions in the inferior frontal gyrus (BA45), precentral gyrus (BA6, BA44), and superior temporal sulcus (BA22) when participants were handed an object in a way that was easy to receive, compared to when they were handed it in a way that was difficult to receive (Shibata, Suzuki, & Gyoba, 2007).