期刊
JOURNAL OF COGNITIVE NEUROSCIENCE
卷 22, 期 5, 页码 824-836出版社
MIT PRESS
DOI: 10.1162/jocn.2009.21240
关键词
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资金
- National Institutes of Health [MH61975, MH062196, NS50067, F31AG031100, F32NS50067, NS054575]
- NSF [SBE0354378]
- Deutsche Forschungsgemeinschaft [SFB 780]
During spatial navigation, lesion and functional imaging studies suggest that the right hemisphere has a unique functional role. However, studies of direct human brain recordings have not reported interhemisphere differences in navigation-related oscillatory activity. We investigated this apparent discrepancy using intracranial electroencephalographic recordings from 24 neurosurgical patients playing a virtual taxi driver game. When patients were virtually moving in the game, brain oscillations at various frequencies increased in amplitude compared with periods of virtual stillness. Using log-linear analysis, we analyzed the region and frequency specificities of this pattern and found that neocortical movement-related gamma oscillations (34-54 Hz) were significantly lateralized to the right hemisphere, especially in posterior neocortex. We also observed a similar right lateralization of gamma oscillations related to searching for objects at unknown virtual locations. Thus, our results indicate that gamma oscillations in the right neocortex play a special role in human spatial navigation.
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