8.11 EEG, Sleep, Memory

Question 1

Range of electric pot. detected by EEG

Answer 1

microV

Question 2

2 types of EEG methods

Answer 2

1. Unipolar

2. Bipolar

Question 3

Describe the frequency and amplitude of each wave

a,b,theta

Answer 3

a- low f, low amp.
b- high f, low amp.
Theta- low f, high amp.

Question 4

f range (Hz) of- a,b,theta,delta

Answer 4

a= 8-13
b= 14-30
Theta= 4-7
Delta= 0.5-4

Hz

Question 5

Describe a wave

f
Where
V
Situation
When disappears

Answer 5

f= 8-13 Hz
Where= occipital
V= 20-200 microV
Situation= eyes closed, relax, awake
When disappears= in deep sleep

Rythmic

Question 6

Describe b waves

f
Where
V
Situation
When disappears

Answer 6

f= 14-30 Hz
Where= temporal+frontal
V= <25 micro V
Situation= eyes open, mental activity, excitement, thinking

Irregular

Question 7

Describe theta waves

Answer 7

f= 4-7 Hz
Situation= sleep, frusturation, disappointment 

Rhythmic

Question 8

Describe delta waves

Answer 8

f= 0.5-4 Hz

Deep sleep

Question 9

Describe types of epileptic seizure

Answer 9

Partial-

1) simple: conscious
2) complex: can be unconscious

General- (consciousness is always loss)

1) grand mal: muscle spasm, urintaion
2) petit mal: brief loss of consc.

Question 10

How does the circadian system adjust?

Answer 10

Light and dark cycle vis the suprachiasmatic nuclei

Question 11

Describe 4 stages of slow wave sleep

Answer 11

1) alpha (+interspersed theta)
2) even slower EEG with bursts of activity (sleep spindle)
3) delta waves
4) delta waves without spindles

Question 12

What is REM and when does it occur?

Answer 12

• Every 90 min
• EEG become desynchronized (similar to alpha waves)
• Very difficult to wake this person