The observation that a person's brain shows beta wave activity is not a reliable indicator of being awake because
a. this pattern is seen in children but not adults.
b. this brain wave pattern also appears during sleep.
c. this wave form waxes and wanes during the day.
d. it can be induced by certain drugs such as alcohol.
e. drugs can elicit this brain wave pattern.
Question 2
The ________ is an instrument used to record electrical potentials from muscles during sleep.
a. myelogram
b. electroencephalogra m
c. physiograph
d. electromyogram
e. retinogram