期刊
CURRENT OPINION IN NEUROBIOLOGY
卷 40, 期 -, 页码 72-80出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.conb.2016.06.010
关键词
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资金
- National Institutes of Mental Health [R01MH106174]
- National Science Foundation [CRCNS1131850]
- Brown Institute for Brain Sciences
- Norman Prince Neurosciences Institute
- Department of Veterans Affairs, Veterans Health Administration, Office of Research and Development, Rehabilitation Research and Development Service [N9228-C]
Rhythms are a prominent signature of brain activity. Their expression is correlated with numerous examples of healthy information processing and their fluctuations are a marker of disease states. Yet, their causal or epiphenomenal role in brain function is still highly debated. We review recent studies showing brain rhythms are not always 'rhythmic', by which we mean representative of repeated cycles of activity. Rather, high power and continuous rhythms in averaged signals can represent brief transient events on single trials whose density accumulates in the average. We also review evidence showing time-domain signals with vastly different waveforms can exhibit identical spectral-domain frequency and power. Further, non oscillatory waveform feature can create spurious high spectral power. Knowledge of these possibilities is essential when interpreting rhythms and is easily missed without considering pre-processed data. Lastly, we discuss how these findings suggest new directions to pursue in our quest to discover the mechanism and meaning of brain rhythms.
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