lab 4 Electroencephalography Exam
Questions and Answers 100% Pass
Alpha - ✔✔waves are low amplitude (20-200 μV) and slow (8-13 Hz)
recorded when a person is relaxed and awake, but with their eyes closed
occipital and parietal - ✔✔greatest amplitude alpha waves are located in these regions
of the cortex
Hyperventilation - ✔✔causes increased alpha wave amplitude by decreasing CO2
levels, which increases the pH of the blood and causes blood pressure to drop.
desynchronization - ✔✔Alpha block
the suppression of alpha wave activity
opening the eyes or by asking a patient to solve a mental task (drawing their attention
to the environment) while their eyes are closed
frequency increases - ✔✔The amplitude decreases;
(alpha waves will be replaced by beta waves), indicating a higher level of cortical
function even though the eyes are closed.
Katelyn Whitman, All Rights Reserved © 2025 1
Questions and Answers 100% Pass
Alpha - ✔✔waves are low amplitude (20-200 μV) and slow (8-13 Hz)
recorded when a person is relaxed and awake, but with their eyes closed
occipital and parietal - ✔✔greatest amplitude alpha waves are located in these regions
of the cortex
Hyperventilation - ✔✔causes increased alpha wave amplitude by decreasing CO2
levels, which increases the pH of the blood and causes blood pressure to drop.
desynchronization - ✔✔Alpha block
the suppression of alpha wave activity
opening the eyes or by asking a patient to solve a mental task (drawing their attention
to the environment) while their eyes are closed
frequency increases - ✔✔The amplitude decreases;
(alpha waves will be replaced by beta waves), indicating a higher level of cortical
function even though the eyes are closed.
Katelyn Whitman, All Rights Reserved © 2025 1
