inferior temporal gyrus


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inferior temporal gyrus

[in′fir·ē·ər ¦tem·pə·rəl ′jī·rəs]
(neuroscience)
A convolution on the temporal lobe of the cerebral hemispheres lying below the middle temporal sulcus and extending to the inferior sulcus.
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When the two groups (dyslexics and controls) were compared on two auditory language tasks (phonological and lexical access) and two hemispheres (right and left), four regions -- middle frontal gyrus, inferior temporal gyrus, precentral gyrus, and orbital frontal cortex -- had a significant interaction between auditory language task and group and the last three had a significant three-way interaction with task, group, and hemisphere.
As previously observed in TD children [5], also UCP children showed activation of areas belonging to the action observation network such as the inferior temporal gyrus (BA37), superior temporal sulcus (BA 22), anterior intraparietal sulcus (BA40-7), inferior parietal lobule (BA40), superior parietal lobule (BA7), precentral gyrus (dorsolateral, BA6-9 and BA6-4), and inferior frontal gyrus (BA45-47).
The nodes with disconnection were the inferior temporal gyrus, fusiform gyrus, amygdala, operculum, temporo-parietooccipital junction, caudate nuclei, inferior parietal gyrus, putamen, and insula.
Results: Compared to the control subjects, the patients with PD showed increased fALFF values in the left inferior temporal gyrus, right inferior parietal lobule (IPL) and right middle frontal gyrus.
Here, volunteers tapped into areas of the brain such as the right inferior temporal gyrus, which decodes metaphorical meaning and abstractedness.
Three different measurements were taken using a pachimeter (Mitutoyo) and a goniometer (Carci) on both hemispheres: M1--the length of the lateral sulcus; M2--the distance from the lateral sulcus to the inferior margin of the inferior temporal gyrus, and M3--the angle formed between the lines of the collateral sulcus and the inferior margin of the inferior temporal gyrus.
However, this same contrast did reveal several brain regions that demonstrated a decreased response after training, including areas associated with sensorimotor processing, such as the left paracentral lobule and postcentral gyrus and right precentral gyrus and inferior temporal gyrus. In addition, the amygdala and middle occipital gyrus also demonstrated decreased response amplitude when observing those movements that had been physically trained (Table 1(a)).
Only a few regions show increased node degree in AD patients: The left inferior temporal gyrus (ITG.L), the left orbital part of superior frontal gyrus (ORBsup.L), and the right MTG (MTG.R).{Figure 6}
Significant increases in relative cortical blood flow were found in the posterior portion of the left inferior temporal gyrus, bilateral fusiform gyri, the medial surface of the bilateral frontal lobes, the right superior parietal lobule, and the left orbital frontal cortex (Table 1, Figure 3).
In six of these regions activity was significantly greater in the depressed subjects than in controls (posterior cingulate gyrus, left inferior temporal gyrus, right superior temporal gyrus, right insula, right parietal lobe, and right fusiform gyrus) and in four of the regions the opposite was the case (bilateral cuneus, the left occipital lobe, and the left medial frontal lobe).
Compared to the controls, the dancers showed significantly higher ALFF in the left middle temporal gyrus, bilateral precentral gyrus, bilateral inferior frontal gyrus, left postcentral gyrus, left inferior temporal gyrus, right middle occipital gyrus, right superior temporal gyrus, and left middle frontal gyrus, and less ALFF in left lingual gyrus (Table 2, Figure 1).
However, other authors emphasize a more lateral source in the inferior temporal gyrus or generators in the p-STS [37, 42, 43].
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