Abstract:
:The current study used a magnetoencephalogram to investigate the relationship between high-gamma (52-100 Hz) activity within an attention network and individual differences in behavioral performance among healthy elderly adults. We analyzed brain activity in 41 elderly subjects performing a 3-stimulus visual oddball task. In addition to the average amplitude of event-related fields in the left intraparietal sulcus (IPS), high-gamma power in the left middle frontal gyrus (MFG), the strength of high-gamma imaginary coherence between the right MFG and the left MFG, and those between the right MFG and the left thalamus predicted individual differences in reaction time. In addition, high-gamma power in the left MFG was correlated with task accuracy, whereas high-gamma power in the left thalamus and left IPS was correlated with individual processing speed. The direction of correlations indicated that higher high-gamma power or coherence in an attention network was associated with better task performance and, presumably, higher cognitive function. Thus, high-gamma activity in different regions of this attention network differentially contributed to attentional processing, and such activity could be a fundamental process associated with individual differences in cognitive aging.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Akimoto Y,Nozawa T,Kanno A,Ihara M,Goto T,Ogawa T,Kambara T,Sugiura M,Okumura E,Kawashima Rdoi
10.1016/j.neuroimage.2014.06.037subject
Has Abstractpub_date
2014-10-15 00:00:00pages
290-300eissn
1053-8119issn
1095-9572pii
S1053-8119(14)00514-Xjournal_volume
100pub_type
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