Final answer:
An EEG shows beta waves during REM sleep, which is when the brain exhibits similar patterns to that of an awake state.Option C is the correct answer.
Step-by-step explanation:
An EEG reading shows beta waves during wakefulness, which has a very low amplitude and a frequency of 13-30 Hz. Beta waves are indicative of an active, alert state or active concentration. Since REM sleep exhibits brain waves similar to the awake state, beta waves can also be expected to occur during this sleep phase. This means that the beta waves would be visible on an EEG during REM sleep, which is the period of sleep in which dreaming occurs and muscle atonia, excluding muscles involved in circulation and respiration, is present.
During REM (Rapid Eye Movement) sleep, the brain displays beta waves on an EEG, resembling patterns observed in an awake state. Beta waves are associated with alertness and active cognitive processes. This occurrence during REM sleep is intriguing as it contrasts with the characteristic slow-wave patterns seen in other sleep stages. The presence of beta waves suggests heightened neural activity, possibly linked to vivid dreaming and the processing of emotional experiences during this sleep phase, contributing to the complexity of the sleep cycle.