Activation Procedures

Question 1

Why do we activate patients

Answer 1

elicit abnormal activity
enhance abnormal activity
some activity can be circumstantial

Question 2

how do we activate patients

Answer 2

HV
Photic
Sleep/deprive
Orienting

Question 3

-effective in evoking epileptiform
-3 Hz spike and wave
-may enhance focal slow wave abnormality

Answer 3

Hyperventilation

Question 4

Physiological changes with HV

Answer 4

Decreases CO2 level in blood, changing metabolism of brain

Question 5

HV contradictions

Answer 5

-sickle cell
-recent cardiac illness
-recent stroke
-distressed breathing/HTN
-SAH

Question 6

HV side effects

Answer 6

lighthead/dizzy
tingling
chilled

Question 7

Normal Response to HV

Answer 7

-No change
-B/L slow waves, frontal max
-pronounced or prolonged with low blood sugar

Question 8

-unlikely to induce a seizure but can produce abnormality
-can demonstrate reactivity in coma

Answer 8

Photic Stim

Question 9

Photic Stim contradictions

Answer 9

None

Question 10

Normal Response to Photic

Answer 10

No response
Photic driving, usually at or near PDR

Question 11

Photic Abnormalities

Answer 11

Photoparoxysmal
Asymmetric Photic Driving

Question 12

What stage sleep is best at eliciting abnormalities

Answer 12

N2

Question 13

what stage suppresses epileptiform

Answer 13

REM

Question 14

Normal response to sleep

Answer 14

None
Falls asleep during hook
Hypnagogic Hypersynchrony
Hypnopompic Hypersynchrony