eeg waves

Question 1

up to 3 Hz
normal in slow wave sleep
babies and young children
Pathological in subcortical lesions, diffuse lesions, metabolic encephalopathy, hydrocephalus and deep midline lesions

Answer 1

Delta

Question 2

4-7 Hz
young children

Answer 2

Theta

Question 3

8-10 Hz
closing eyes- attenuate on opening eyes
Pathological in coma

Answer 3

Alpha

Question 4

coma pathology

Answer 4

Pathological Alpha

Question 5

12-13 Hz
active working
some antidepressants increase activity

Answer 5

Beta

Question 6

benzodiazepines

Answer 6

Pathological Beta

Question 7

3Hz bilateral symmetry spike and wave

Answer 7

Absence seizure

Question 8

focal slow wave activity

Answer 8

focal seizure

Question 9

periodic tri or bi-phasic sharp waves
1-2hz sharp waves

Answer 9

CJD

Can also be accompanied by myoclonic waves
Psychiatric symptoms are prominent at start of variant types

Question 10

low voltage EEG

Answer 10

huntingtons

Question 11

generalised theta or delta wave activity

Answer 11

metabolic encephalopathy

Question 12

deep white matter changes on MRI

Answer 12

depression in the elderly

Question 13

impaired working memory in schizophrenia

Answer 13

DL PFC impaired activity on fMRI

Question 14

asymmetrical pattern

Answer 14

vascular dementia

Question 15

Brief bursts of slow waves during stage 2 NREM sleep

Answer 15

K complexes

Question 16

12-14 Hz waves that occur during stage 2 sleep with K complexes and are absent in NREM sleep in patients with schizophrenia

Answer 16

sleep spindles

Question 17

Temporal intermittent rhythmic delta slowing

Answer 17

absence seizures
Herpes simplex encephalitis

Question 18

bilateral synchronous high amplitude spike and slow waves

Answer 18

subacute sclerosing pan encephalitis

Question 19

3Hz diffuse spike and wave

Answer 19

absence seizures