14.7 Brain Waves

Question 1

This device measures brain waves (electrical neuron activity) mainly in the cerebral cortex, through electrodes placed on forehead and scalp

Answer 1

Electroencephalogram EEG

Question 2

The four types of brain waves that are patterns of brain neuron activation

Answer 2

1. Alpha
2. Beta
3. Theta
4. Delta

Question 3

These brain waves occur at 8-13 hertz; present in EEGs of almost all normal people whern resting with eyes closed, disappear during sleep

Answer 3

Alpha Waves

Question 4

These waves are 14-30 hertz; appear when nervous system is active (periods of sensory input and mental activity)

Answer 4

Beta Waves

Question 5

These waves have frequency of 4-7 hz; normally occur in children and adults in emotional distress

Answer 5

Theta Waves

Question 6

These brain waves are 1-5 hz; occur during deep sleep in adults; normal in awake infants; if produced by an awake adult they indicate brain damage

Answer 6

Delta Waves