EEG findings

Question 1

Absence seizures

Answer 1

Regular 3Hz complexes

Question 2

Initially generalized slowing.
Then periodic 1-2Hz sharp waves

Answer 2

Sporadic CJD

Question 3

Huntington’s

Answer 3

Loss of alpha waves. Later flattened trace.

Question 4

Generalised 3-6Hz poly spike complexes

Answer 4

Myoclonic seizures

Question 5

Diffuse, synchronous, high voltage slowing

Answer 5

Encephalitis

Question 6

Hepatic encephalopathy

Answer 6

Triphasic waves, 1.5-3 per second. High voltage slow waves

Question 7

Sporadic CJD

Answer 7

Initially generalized slowing.
Then periodic 1-2Hz sharp waves

Question 8

Myoclonic seizures

Answer 8

Generalised 3-6Hz poly spike complexes

Question 9

Delirium tremens

Answer 9

Fast beta activity

Question 10

Episodic discharges every 1-3s and variable focal waves over temporal areas

Answer 10

HSV encephalitis

Question 11

Loss of alpha waves. Later flattened trace.

Answer 11

Huntington’s

Question 12

Regular 3Hz complexes

Answer 12

Absence seizures

Question 13

Neurosyphilis

Answer 13

Non-specific increase in slow waves

Question 14

HSV encephalitis

Answer 14

Episodic discharges every 1-3s and variable focal waves over temporal areas

Question 15

Hypsarrhythmia - diffuse giant waves >400mV

Answer 15

Infantile Spasms

Question 16

Triphasic waves, 1.5-3 per second. High voltage slow waves

Answer 16

Hepatic encephalopathy

Question 17

Non-specific increase in slow waves

Answer 17

Neurosyphilis

Question 18

Infantile Spasms

Answer 18

Hypsarrhythmia - diffuse giant waves >400mV

Question 19

Metabolic encephalopathy

Answer 19

Diffuse delta & theta waves (slowing)

Question 20

Encephalitis

Answer 20

Diffuse, synchronous, high voltage slowing

Question 21

Diffuse delta & theta waves (slowing)

Answer 21

Metabolic encephalopathy

Question 22

Fast beta activity

Answer 22

Delirium tremens