AP PSYCHOLOGY

Detailed explanation-1: -The early portion of stage 1 sleep produces alpha waves, which are relatively low frequency (8–13Hz), high amplitude patterns of electrical activity (waves) that become synchronized. This pattern of brain wave activity resembles that of someone who is very relaxed, yet awake.

Detailed explanation-2: -View Source of brain waves. Being drowsy or more deeply asleep often corresponds with brain waves occurring at a lower frequency. Alpha waves are a type of brain wave that can occur between alertness and sleep.

Detailed explanation-3: -Alpha waves in healthy, awake adults occur while resting with the eyes closed. They disappear during sleep and vanish when there is concentration on a specific task. The rhythm of alpha waves may have a frequency between 8 and 13 Hz. Alpha waves are maximal over the occipital region.

Detailed explanation-4: -Alpha waves, which measure between 8 and 12 Hz, occur when people feel relaxed and when the brain is in an idle state without concentrating on anything. Beta waves, which measure between 12 and 30 Hz, are the waves that occur during most conscious, waking states.

Detailed explanation-5: -Furthermore, waves provide an excellent means of inducing sleep, and it has been shown that alpha rhythm is related to NREM (Non-Rapid Eye Movement) at the beginning of sleep24, 25).