An electroencephalograph (EEG)is recording Juan's brain activity,and the recording is currently dominated by delta waves.At the same time,there are a series of beeps from one of the other machines.Which of the following is likely

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CDelta waves are most commonly associated with the deepest stages of sleep (NREM stages 3 and 4), indicating that Juan is in a deep sleep. Therefore, it's unlikely that external noises like beeps would easily wake him (A). It's also possible for external sounds to be incorporated into dreams, although this is more common in lighter stages of sleep, it can still occur during deeper sleep stages (C). Sleep spindles (B) are characteristic of lighter stages of NREM sleep (stage 2), not the deep sleep indicated by delta waves. Similarly, the assertion that Juan is in a "relatively light sleep" (D) is incorrect given the presence of delta waves, which denote deep sleep.

An Electroencephalograph (EEG)is Recording Juan's Brain Activity,and the Recording Is