Fisch EEG Primer Chapter 8 Flashcards
Definition of the normal EEG, relation to brain function
An EEG is called normal when it…
lacks abnormal patterns known to be associated with clinical disorders
Does a statistically rare EEG pattern demonstrate abnormality
not necessarily
Does a normal EEG guarantee the absence of pathology
No. Not all abnormalities of brain strucuture/function produce EEG abnormalities.
Which state leads to the most variability of normal EEG patterns
awake and drowsy states have more variability than sleep
Which EEG patterns have been proven to be definitely abnormal for each age group?
Spikes, sharp waves, certain slow waves and amplitude changes
The major age related subdivisions for EEG are:
- EEG up to age 19
- EEG age 20-60
- EEG age over 60
The EEG in those up to 19 years old is marked by…
a greater variety of normal patterns than seen in adulthood