II.M Normal / Abnormal adult EEG

Question 1

When the posterior background rhythm does not attenuate with eye opening it is referred to as:
A) Dejerine Phenomenon
B) Bancaud Phenomenon
C) Uhthoff’s Phenomenon
D) Tullio Phenomenon

Answer 1

Bancaud Phenomenon

Question 2

An abnormal EEG finding in an awake 55 year old patient would be
A) Delta activity
B) Frontal rhythmic delta activity during hyperventilation
C) Temporal theta
D) Posterior rhythm of 8 Hz

Answer 2

Delta activity

Question 3

The prevalent activity seen in this adult EEG recording is indicative of:
A) Encephalopathy
B) Intractable epilepsy
C) Slow wave sleep
D) Sleep apnea

Answer 3

Encephalopathy

Question 4

Which of the following should not be seen in the normal awake adult?
A) no alpha background
B) delta
C) wicket spikes
D) 14 Hz

Answer 4

delta

Question 5

Which normal waveform is NOT typically seen in the posterior leads?
A) Wickets
B) Slow Alpha Variant
C) Photic driving
D) POSTS

Answer 5

Wickets

Question 6

LPDs
A) Lateralized periodic discharges
B) Left parietal discharges
C) Left parietal delta
D) Lateralized periodic delta

Answer 6

Lateralized periodic discharges

Question 7

What is most important when evaluating the background activity?
A) Ensure the patient is sleep deprived
B) Record with patient’s eyes open
C) Have the patient hyperventilate
D) Record the maximal state of alertness

Answer 7

Record the maximal state of alertness

Question 8

Which of the following is abnormal?
A) asymmetric attenuation of the alpha activity
B) asymmetric lambda waves
C) asymmetric POSTS
D) asymmetric mu rhythm

Answer 8

asymmetric attenuation of the alpha activity

Question 9

Normal EEG in adults of age 70 or older is similar to those younger with the following exception:
A) Beta is rarely seen
B) REM sleep is less than 20% of total sleep time
C) Alpha becomes more reactive
D) Slow waves are less prominent

Answer 9

REM sleep is less than 20% of total sleep time

Question 10

What would you expect to see in the frontal regions of a normal adult?
A) low voltage fast activity and eye movement artifact
B) low voltage slow activity and high voltage eye movement artifact
C) high amplitude fast activity and eye movement
D) high amplitude delta activity

Answer 10

low voltage fast activity and eye movement artifact

Question 11

Which would be of concern in the EEG of a 65 year old patient?
A) Fronto-central beta
B) No alpha background
C) 7 Hz background
D) No EEG change during HV

Answer 11

No alpha background

Question 12

Which of the following represents an abnormal EEG pattern?
A) Well-formed posterior dominant rhythm of 17 Hz
B) Alpha frequency of 9 Hz in O1 and 11.5 in O2
C) Alpha voltage amplitude of 20 uV in O1 and 28 uV in O2
D) Alpha squeak

Answer 12

Alpha frequency of 9 Hz in O1 and 11.5 Hz in O2

Question 13

ADA
A) Abnormal Delta Amplitude
B) Abnormal Delta Activity
C) Arrthymic Delta Amplitude
D) Arrthymic Delta Activity

Answer 13

Arrhythmic Delta Activity

Question 14

EEG with a very tense and anxious patient shows
A) Unusually widespread alpha
B) Burst of rhythmic slow over posterior regions
C) Widespread low voltage activity
D) Unusually high amplitude alpha

Answer 14

Widespread low voltage activity

Question 15

What percentage of adults have asymmetrical alpha?
A) 0.2%
B) 50%
C) 20%
D) 60%

Answer 15

60%

Question 16

Alpha
A) During drowsiness
B) 7-12 Hz
C) Diminishes with eyes open
D) Awake with eyes open

Answer 16

Diminishes with eyes open