Evoked potential
Evoked Potential
Evoked potential or EP is a measure of the electrical activity of the brain in response to a specific stimulus.
Pronunciation
E-voked Po-ten-tial
Etymology
The term "evoked potential" is derived from the Latin words "evocare" meaning "to call out" and "potential" from the Latin "potentia" meaning "power".
Definition
An Evoked potential is a test that measures the time it takes for the brain to respond to sensory stimulation. The stimuli can be visual, auditory, or somatosensory, and the responses are recorded via electrodes placed on the scalp.
Types of Evoked Potentials
There are several types of evoked potentials, including:
- Visual Evoked Potential (VEP): This measures the electrical activity in the vision system.
- Auditory Evoked Potential (AEP): This measures the electrical activity in the hearing system.
- Somatosensory Evoked Potential (SEP): This measures the electrical activity in the sensory system.
Clinical Use
Evoked potentials are used in clinical settings to assess the function of the sensory pathways in the nervous system. They can help diagnose a variety of neurological conditions, such as Multiple Sclerosis, Optic Neuritis, and Acoustic Neuroma.
Related Terms
- Electroencephalogram (EEG): A test that measures the electrical activity of the brain.
- Electrode: A conductor through which electricity enters or leaves an object, substance, or region.
- Neurology: The branch of medicine dealing with disorders of the nervous system.
External links
- Medical encyclopedia article on Evoked potential
- Wikipedia's article - Evoked potential
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