[Effect of chewing-side preference on activation of parahippocampal gyrus during clenching task].
OBJECTIVE
To explore effects of chewing-side preference (CSP) on cerebral cortical response during clenching task with functional magnetic resonance imaging (fMRI).


METHODS
Seven patients with left CSP and 7 patients with right CSP were selected to perform the maximum voluntary clenching in intercuspal position, and block designed blood oxygenation level-dependent (BOLD) fMRI scan covering the whole brain was carried out.


RESULTS
There was activation in the parahippocampal gyrus in the four patients among seven with left CSP. But there was no activation in the parahippocampal gyrus among the patients with right CSP.


CONCLUSIONS
This research shows that the parahippocampal gyrus, which is associated with human memory and study, is activated during clenching task in the patients with left CSP.
Jiang
Hua
H
Department of Stomatology, General Hospital of PLA, Beijing 100853, China.
Liu
Hong-chen
HC
Jin
Zhen
Z
Liu
Gang
G
Li
Ke
K
Zeng
Ya-wei
YW
D000328:Adult; D001732:Bite Force; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008409:Mastication / Q000502:physiology*; D008568:Memory / Q000502:physiology; D020534:Parahippocampal Gyrus / Q000502:physiology*; D055815:Young Adult