EEG Waves Flashcards
1
Q
EEG is used to study what conditions?
EEG requires how many electrodes? where?
A
Sleep disorders, epilepsy, localization of trauma.
21, 19 in head, 1 in each ear (2: A1 and A2)
2
Q
what are the brain waves recorded by an EEG?
what are their wavelength range?
A
- Alpha 8-13 cycles/second (Hz)
- Beta 14-30 Hz
- Theta 4-7 Hz
- Delta 1-5 Hz
- Gamma 30-100 Hz
- Mu 8-13 Hz
3
Q
when do you see Alpha waves?
when do they decrease?
A
- awake, resting state (eyes closed)
- eye opening or mental exertion
4
Q
when do you see Beta waves?
when does it decrease?
A
- during activation of nervous system (during sensory input and mental activity)
- during movement
5
Q
when do you see Theta waves?
A
- children and adults during emotional stress, mental disorders, meditative state, creative state
6
Q
when do you see Delta waves?
A
- during deep sleep in adults, awake infants
7
Q
If delta waves are present in awake adults they likely indicate what?
A
brainstem injury
8
Q
when do you see Gamma waves?
when do you see Mu waves?
A
- Groups of neurons working togetherfor a specific cognitive or motor task.
- Overlaps with other frequencies. Reflects the synchronous activity of motor neurons in the resting state.
9
Q
what brain wave is this?
A
10
Q
what brain wave is this?
A
11
Q
identify the brain waves
A
12
Q
identify the brain waves
A
