Alpha synchronization during auditory spatial short-term memory

作者：Kaiser Jochen^*; Heidegger Tonio; Wibral Michael; Altmann Christian F; Lutzenberger Werner

来源：NeuroReport, 2007, 18(11): 1129-1132.

DOI：10.1097/WNR.0b013e32821c553b

• alpha activity
• auditory spatial processing
• cortical oscillations
• delayed matching-to-sample
• human participants
• magnetoencephalography
• posterior parietal cortex
• short-term memory

Recent studies have suggested an active role of cortical a oscillations for cognitive functions including short-term memory. We used magnetoencephalography to assess a activity during an auditory spatial delayed matching-to-sample task compared with a nonmemory control condition. In the memory task, participants had to memorize the lateralization angle of a noise stimulus SI and compare it with another lateralized sound S2 presented after an 800-ms delay phase. Whereas a desynchronization following SI was observed over superior temporal areas under both conditions, only the memory task was accompanied by posterior parietal a synchronization during the subsequent delay period. The findings are consistent with the notion of a activity reflecting active inhibition of interfering processes during memory maintenance of spatial sounds.

• 出版日期2007-7-16
• 单位河北医科大学