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Flashcards in EEG Waves Deck (12):
1

EEG is used to study what conditions?

 

EEG requires how many electrodes? where?

Sleep disorders, epilepsy, localization of trauma.

 

21, 19 in head, 1 in each ear (2: A1 and A2)

2

what are the brain waves recorded by an EEG?

what are their wavelength range?

  • 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

when do you see Alpha waves?

when do they decrease?

  • awake, resting state (eyes closed)
  • eye opening or mental exertion

4

when do you see Beta waves?

when does it decrease?

  • during activation of nervous system (during sensory input and mental activity)
  • during movement

5

when do you see Theta waves?

  • children and adults during emotional stress, mental disorders, meditative state, creative state 

6

when do you see Delta waves?

 

  • during deep sleep in adults, awake infants

7

 If delta waves are present in  awake adults they likely indicate what?

brainstem injury

8

when do  you see Gamma waves?

 

when do you see Mu waves?

  • 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

what brain wave is this?

10

what brain wave is this?

11

identify the brain waves

12

identify the brain waves