Question 1

Alpha block, the suppression of alpha waves that can be seen in the EEG, occurs when .&#10;A)you open your eyes, after having relaxed with eyes closed&#10;B)an individual is relaxed, with eyes closed&#10;C)one goes from a drowsy state into deep sleep&#10;D)a person is in a coma

Accepted Answer

Alpha block refers to the suppression of alpha waves in the EEG, which typically occurs when an individual opens their eyes after being in a relaxed state with their eyes closed. Alpha waves are most prominent when a person is relaxed and alert with their eyes closed. Opening the eyes or engaging in attentive mental activities can cause these waves to diminish or "block," hence the term "alpha block."

Question 2

Brain waves of this type predominate when an individual is attentive and alert.&#10;A)delta&#10;B)alpha&#10;C)beta&#10;D)theta

Accepted Answer

Beta waves are most prominent when an individual is awake, alert, and engaged in mental activities that require concentration and attention.

Question 3

This type of brain wave is normal in children, but abnormal in adults.&#10;A)delta&#10;B)beta&#10;C)alpha&#10;D)theta

Accepted Answer

Theta waves are normal in children but can indicate emotional stress or brain disorders in adults. They are slower than alpha and beta waves, typically seen in deep relaxation or light sleep in adults.

Question 4

The electroencephalogram (EEG)is a recording of .&#10;A)electrical activity of muscles of the skull&#10;B)electrical activity of the surface of the brain&#10;C)electrical potentials in the skin of the scalp

Accepted Answer

The electroencephalogram (EEG) is specifically designed to record the electrical activity of the surface of the brain, not the muscles of the skull or the electrical potentials in the skin of the scalp.

Question 5

Deep sleep is associated with _ .&#10;A)theta waves&#10;B)beta waves&#10;C)delta waves&#10;D)alpha waves

Accepted Answer

Deep sleep is associated with delta waves, which are high amplitude brain waves with a frequency of 1-4 Hz. This stage of sleep is crucial for restorative processes and memory consolidation.

Question 6

EEG activity may be recorded on .&#10;A)an oscilloscope, a physiograph, or computer- based data acquisition equipment&#10;B)a physiograph&#10;C)an oscilloscope&#10;D)computer- based data acquisition equipment

Accepted Answer

EEG activity can be recorded on various types of equipment including an oscilloscope, a physiograph, or computer-based data acquisition equipment, making all the options correct as part of a comprehensive list.

Question 7

A physician may order an EEG study if the patient is suspected as having .&#10;A)a possible fracture of the frontal bone&#10;B)brain damage resulting from a deep cut in the scalp&#10;C)a broken nose&#10;D)a tumor

Accepted Answer

An EEG (electroencephalogram) study is ordered to assess the electrical activity in the brain, which can be altered by conditions such as tumors, making it a useful tool in diagnosing brain disorders, not bone fractures or superficial injuries.

Question 8

Respiratory alkalosis results in EEG waves .&#10;A)that resemble an epileptic seizure&#10;B)in the theta range&#10;C)that are slower than delta waves&#10;D)that are flat

Accepted Answer

Respiratory alkalosis can lead to cerebral vasoconstriction, which may result in EEG changes that resemble those seen in epileptic seizures due to the altered electrical activity in the brain.

Question 9

An EEG study may be used to diagnose _ .&#10;A)epilepsy&#10;B)hydrocephalus&#10;C)visual abnormalities&#10;D)hormonal disorders of the brain

Accepted Answer

EEG studies are primarily used to diagnose conditions that affect the brain's electrical activity, such as epilepsy.

Question 10

An EEG showing either very rapid or extremely slow frequency brain waves may occur when an individual is .&#10;A)moving about&#10;B)alert and speaking&#10;C)unconscious&#10;D)drowsy

Accepted Answer

An EEG showing either very rapid or extremely slow frequency brain waves may occur when an individual is unconscious. This is because consciousness level significantly affects brain wave patterns, with unconscious states often associated with abnormal or extreme EEG readings.

Question 11

Which of the following EEG waves has the lowest frequency?&#10;A)theta&#10;B)beta&#10;C)alpha&#10;D)delta

Accepted Answer

The answer of Which of the following EEG waves has...

Question 12

EEG studies are valuable because .&#10;A)they are relatively easy to record and analyze&#10;B)they are noninvasive&#10;C)they can reveal many kinds of brain abnormalities&#10;D)they are noninvasive, they can reveal many kinds of brain abnormalities, and they are relatively easy to record and analyze.

Accepted Answer

The answer of EEG studies are valuable because .&#10;A)they are...

Question 13

An alert individual has a _.&#10;A)nearly flat EEG&#10;B)relatively rapid frequency pattern of brain waves&#10;C)relatively slow frequency pattern of brain waves

Accepted Answer

The answer of An alert individual has a _.&#10;A)nearly flat...

Deck 18: Electroencephalography