electrodecrement
Pronunciation: e-LECK-tro-DECK-re-ment
Sudden reduction in EEG amplitude marking the electrographic onset of certain seizure types.
Full Definition
Electrodecrement, also known as desynchronization, refers to an abrupt flattening or marked reduction in EEG amplitude that can herald the onset of certain seizure types, particularly absence seizures and some focal seizures. This pattern represents a sudden change from the background rhythm to lower amplitude, faster activity, often preceding the development of more obvious epileptiform patterns. Electrodecrement can be subtle and easily missed, making it an important pattern for neurophysiology technologists and interpreting physicians to recognize as a potential seizure onset marker rather than artifact or normal variation.
Usage
Usage note: Single word, not hyphenated; easily confused with technical artifacts.
In Context
- "The seizure onset was characterized by subtle electrodecrement over the left temporal region." — EEG interpretation
- "Recognition of electrodecrement patterns improved seizure detection rates in this patient population." — Quality improvement study