The posterior parietal cortex in visuospatial attention:study with continuous theta burst stimulation
10.3760/cma.j.issn.0254-1424.2013.09.004
- VernacularTitle:后顶叶皮质调控视空间注意功能的经颅磁刺激研究
- Author:
Guangqing XU
;
Yue LAN
;
Zhenghong CHEN
;
Jiangli ZHAO
;
Dongfeng HUANG
- Publication Type:Journal Article
- Keywords:
Visuospatial attention;
Posterior parietal cortex;
Transcranial magnetic stimulation;
Inhibition
- From:
Chinese Journal of Physical Medicine and Rehabilitation
2013;35(9):687-690
- CountryChina
- Language:Chinese
-
Abstract:
Objective To seek more direct evidence of the role of the posterior parietal cortex (PPC) in controlling visuospatial attention.Methods Forty healthy subjects took the Attention Network Test following continuous theta burst stimulation (cTBS) applied over the left or right PPC or sham stimulation.The Attention Network Test measures the alerting,orienting and executive control components of visual attention separately.Results Subjects responded to spatial cues significantly slower after cTBS.Alerting and orienting showed deficits after cTBS over the right PPC.cTBS over the left PPC resulted in significant improvements in alerting,but not in the orienting.Furthermore,there were significant differences in the alerting and orienting indices between cTBS over the left and right PPC,but not in the executive control index.Conclusions The results suggest that the right PPC is associated with spatial orienting and the alerting function.The findings supported the theory of inter-hemispheric competition for visuospatial attention.Visuospatial attention bias might be selectively modulated through cTBS.
