Term background voltage and electrocerebral inactivity

Criteria & assessment

• Normal term background has most activity >=25 µV peak-to-peak in every behavioral state.
• Borderline low voltage is continuous, retains normal activity and graphoelements, and is persistently >=10 and <25 µV peak-to-peak.
• Low-voltage suppressed background lacks normal features, has fundamental baseline <10 µV peak-to-peak, permits >=10 µV transients only when <2 seconds, and is invariant and unreactive.
• ECI means no discernible cerebral activity at or above 2 µV peak-to-peak when reviewed at sensitivity 2 µV/mm and only when ECI technical standards were met; otherwise report only that the record may be consistent with ECI.