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These waves attenuate (weaken) on opening the eyes.

a) Alpha waves
b) Beta waves
c) Delta waves
d) Theta waves

User Dokkaebi
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1 Answer

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Final answer:

Alpha waves, which have a frequency of 8-12 Hz, weaken or attenuate when the eyes are opened, making 'a) Alpha waves' the correct answer to the student's question.

Step-by-step explanation:

The alpha waves are the type of brain wave characteristic during the early part of NREM stage 1 sleep, which has fairly low amplitude and a frequency of 8-12 Hz. These waves attenuate, meaning they weaken on opening the eyes. In contrast, beta waves are associated with wakefulness and have a higher frequency of 13-30 Hz. Alpha waves are more synchronized and exhibit less variability than beta waves, becoming prominent when a person is relaxed with closed eyes. Thus, the correct answer is a) Alpha waves.

User Bmuig
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