evoked potential


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Related to evoked potential: Somatosensory evoked potential

e·voked po·ten·tial

an event-related potential, elicited by, and time-locked to, a stimulus.
See also: evoked response.

evoked potential (EP)

[ivōkt′]
Etymology: L, evocare, to call forth, potentia, power
an electrical response in the brainstem or cerebral cortex that is elicited by a specific stimulus. The stimulus may affect the visual, auditory, or somatosensory pathway, producing a characteristic brain wave pattern. The activity and function of the system may be monitored during surgery while the patient is unconscious. The surgeon is thus able to prevent damage to the nerves during operative procedures. Evoked potentials are also used to diagnose multiple sclerosis and various disorders of hearing and of sight. Kinds of evoked potentials include brainstem auditory evoked response, somatosensory evoked potential, and visual-evoked potential. See also brain electric activity map.

e·voked po·ten·tial

(ē-vōkt pō-tenshăl)
Event-related potential, elicited by, and time-locked to, a stimulus.

Evoked potential

A test of nerve response that uses electrodes placed on the scalp to measure brain reaction to a stimulus such as a touch.
Mentioned in: Spinal Stenosis

evoked potential,

n an electrical response in the brainstem or cerebral cortex that is elicited by a specific stimulus. This property of the brain may be used to monitor brain function during surgery.

evoked potential

References in periodicals archive ?
Combined motor and somatosensory evoked potential monitoring for intramedullary spinal cord tumor surgery: correlation of clinical and neurophysiological data in 17 consecutive procedures.
Somatosensory evoked potentials during decompression and stabilization of the spine.
Neurophysiological examination showed normal visual, auditory and somatosensory evoked potentials, while the EEG revealed a single focal burst of sharp transients left mid-temporally; the alpha rhythm showed lower voltage on the left side.
Intensity dependence of auditory evoked potentials as an indicator of central serotonergic neurotransmission: A new hypothesis.
Auditory brainstem evoked potentials in evaluating the efficacy of surgical ventilation of the middle ear.
RICKARDS, FW; TAN, LE; COHEN, LT; WILSON, OJ; DREW, JH & CLARK, GM 1994: Auditory steady state evoked potentials in newborns.
An additional issue important to the development and evolution of cortical electrophysiology is the development of analysis techniques useful for evoked potential data.
This breakthrough in gaming uses a type of brain signal called the steady-state visual evoked potential, or SSVEP, which is picked up by a few electrodes mounted on the head.
A = Amplitude, L = Latency, VEP = Visual evoked potential, VOR=Vestibulo-ocular reflex, OKN = Optokinetic nystagmus, ?
Electrodes for determining BIS and auditory evoked potential were placed on the foreheads of all patients according to manufacturer's specifications at least six hours after patients' arrival at the intensive care unit.
Delayed brainstem auditory evoked potential latencies in 14-year-old children exposed to methylmercury.