Compare and contrast delta, alpha, beta, and gamma waves.
What will be an ideal response?
Ans: Delta waves are associated with sleep and generally are less than 4 Hz (Hertz). Theta waves occur when people are daydreaming or experience drowsiness and are associated with 4–8 Hz (Heinrich et al., 2007; Myers & Young, 2012). Alpha waves represent the brain and neurons readiness for action but in a standby state (8–13 Hz). Also, alpha waves are associated with a relaxed state. Beta waves (13–30 Hz) are associated with thinking and focusing, and maintaining attention, whereas high beta waves (20–32 Hz) are associated with hyperactivity and anxiety (Myers & Young 2012). Finally, gamma waves in essence serve to bind the other waves and appear to be involved in connectivity between different brain regions (30–80 Hz). Colgin et al. (2009) described gamma waves as a binding mechanism for neurons, so they fire together. Gamma waves have been associated with cognitive functioning (Colgin et al., 2009).
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