Clinical Neurophysiology Glossary

EMG assessment of how motor units are activated with increasing voluntary muscle contraction, indicating the integrity o...

EEG display configuration comparing each electrode to a common reference point for localization of abnormalities.

Epilepsy that fails to respond adequately to two appropriate antiepileptic medications tried sequentially at therapeutic...

A parasomnia characterized by loss of normal muscle atonia during REM sleep, resulting in dream enactment behaviors.

Abnormal EMG findings characterized by repeated firing of the same muscle fiber or motor unit, often indicating neuromus...

An electrodiagnostic technique using repeated nerve stimulation to assess neuromuscular junction function.

A neurophysiological test measuring electrical activity in the brain in response to touch or vibration stimuli.

A clearly distinguishable EEG waveform with pointed peak and duration of 70-200 milliseconds.

The structural organization and pattern of sleep stages throughout a sleep period.

Abnormal occurrence of REM sleep within 15 minutes of sleep onset, often associated with narcolepsy and other hypersomno...

Characteristic EEG waveforms appearing during stage 2 sleep, consisting of 11-15 Hz activity in spindle-shaped bursts.

Sensory nerve action potential; the electrical response recorded from a peripheral sensory nerve following stimulation.

A characteristic EEG pattern consisting of a sharp spike followed by a slow wave, typically associated with epileptic ac...

A neurophysiological test measuring electrical responses along sensory pathways from peripheral nerves to the cerebral c...

Medical emergency characterized by prolonged seizure activity lasting more than five minutes or recurrent seizures witho...

Electrical interference in neurophysiological recordings caused by stimulation devices, requiring recognition and filtra...

Epileptic discharge visible on EEG without observable clinical symptoms or behavioral changes.

Sudden unexpected death in epilepsy; unexplained death in individuals with epilepsy, often occurring during or after sei...

A specific EEG pattern of rhythmic 1.5-2.5 Hz activity over the temporal regions, often indicating temporal lobe patholo...

Neurophysiological phenomenon where rapid successive stimuli produce enhanced responses, testing synaptic function.

EEG activity in the 4-8 Hz frequency range, normal in children and during drowsiness in adults, but abnormal when excess...

Temporal intermittent rhythmic delta activity suggesting temporal lobe dysfunction or seizure susceptibility.

Unified Parkinson's Disease Rating Scale; a standardized clinical assessment tool used in movement disorder neurophysiol...

Vestibular evoked myogenic potential; a neurophysiological test assessing vestibular organ and pathway function through...