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单词 beta rhythm
释义

WordReference Random House Unabridged Dictionary of American English © 2024
beta rhythm′, 
  1. Physiologya pattern of high-frequency brain waves (beta waves) observed in normal persons upon sensory stimulation, esp. with light, or when they are engaging in purposeful mental activity.
  • 1935–40; earlier beta waves, translation of German Betawellen; see alpha rhythm

Collins Concise English Dictionary © HarperCollins Publishers::
beta rhythm, beta wave n
  1. the normal electrical activity of the cerebral cortex, occurring at a frequency of 13 to 30 hertz and detectable with an electroencephalograph
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