Question

Jordanna has decided to go to bed early. Although her eyes are closed and she's very relaxed, she has not yet fallen asleep. An electroencephalograph is most likely to indicate the presence of?

A) delta waves
B) alpha waves
C) sleep spindles
D) rapid eye movements

Answer 1

When Jordanna is in a relaxed state but not yet asleep, an electroencephalograph (EEG) is most likely to indicate the presence of alpha waves.

Step-by-step explanation:

When Jordanna is in a relaxed state but not yet asleep, an electroencephalograph (EEG) is most likely to indicate the presence of alpha waves.

Alpha waves are low frequency and high amplitude brain waves that represent a relaxed yet awake state. They have a frequency of 8-12 Hz and are more synchronized and higher in amplitude compared to beta waves, which are characteristic of wakefulness.

Delta waves, sleep spindles, and rapid eye movements (REM) are associated with different stages of sleep, but they are not present when someone is relaxed but not yet asleep.

Answer 2

An electroencephalograph would most likely detect alpha waves in Jordanna as she is relaxed with her eyes closed but not yet asleep.

Step-by-step explanation:

If Jordanna has decided to go to bed early, and although she's relaxed with her eyes closed but has not yet fallen asleep, an electroencephalograph (EEG) would most likely indicate the presence of alpha waves.

These occur during the relaxed state just before sleep onset, specifically during the early part of non-REM (NREM) stage 1 sleep. They have a relatively lower frequency ranging from 8-12 Hz and are higher in amplitude than beta waves, which are characteristic of full wakefulness.