EEGs and Sleep Flashcards
What EEG changes in CJD
generalised periodic 1-2 Hz sharp waves in sporadic CJD (less often in familial, and not seen in variant form)
What EEG changes in absence seizures
Regular 3 Hz complexes
What EEG changes in myoclonic epilepsy
generalised multiple “polyspike” spike-wave discharges
What EEG changes in Huntington’s disease
initial loss of alpha waves, later flattened trace
What EEG changes in hepatic encephalopathy
Triphasic waves (high voltage slow waves)
What EEG changes in Alzheimers disease
reduced alpha waves
What EEG changes in partial seizures
LOCALISED spike or spike-wave discharges
What EEG changes in schizophrenia
no characteristic pattern
What EEG changes in psychopathy
Immature posterior temporal slow waves
What EEG changes in delirium
some alpha activity and generalised increased delta waves
What EEG changes with antipsychotics
slowing of beta and increase in alpha, theta and delta
What EEG changes with antidepressants
slowing of beta and increase in alpha, theta and delta
What EEG changes with anticonvulsants
no effect on awake EEG
What EEG changes with benzodiazepines
increase in beta and decrease in alpha. overdose leads to diffuse slowing
What EEG changes with delirium tremens
fast beta wave activity (unlike other derliums which have increased slow waves)
What EEG changes with alcohol
increased alpha wave and theta
What EEG changes with opioids
decreased alpha, increased theta and delta. In overdose slow waves are predominant
What EEG changes with cannabis
increased alpha in frontal area
What EEG changes with cocaine
increased alpha
What EEG changes with barbituates
decreased alpha, increased beta
What EEG changes with herpes simplex encephalitis
episodic discharges every 1=3 seconds with variable focal waves
