evoked potential

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evoked potential

A scientist measures an evoked potential on a monitor during an experiment.

Definition
  1. Noun:
    • A specific electrical signal in the brain or nervous system: An "evoked potential" is a measurable electrical response generated by the central nervous system (the brain and spinal cord) when it is stimulated by a specific, external event, such as a sound, light, or touch.
Usage
  • This term is used almost exclusively in medical, neurological, and scientific contexts to describe and diagnose the function of sensory pathways and the brain's processing of stimuli.
  • It is typically measured using specialized equipment like an electroencephalogram (EEG) or electrodes placed on the scalp or skin.
Examples
  • Noun:
    • The doctor ordered a test to check the auditory evoked potential, which measures the brain's response to sounds.
    • Abnormal visual evoked potentials can indicate problems with the optic nerve.
Advanced Usage
  • "to record an evoked potential": to capture and measure this specific neural response.
    • Researchers recorded the somatosensory evoked potential by applying a gentle electrical pulse to the patient's wrist.
  • "evoked potential study/ testing": a diagnostic procedure involving these measurements.
    • The evoked potential study helped localize the site of the neurological lesion.
Variants and Related Words
  • Evoked Response: Often used synonymously with "evoked potential."
  • Sensory Evoked Potential: A more specific term for responses from sensory stimuli (e.g., visual, auditory).
  • Event-Related Potential (ERP): A related term often used in cognitive neuroscience for brain responses linked to specific sensory, cognitive, or motor events.
Synonyms
  • Cortical evoked response
  • Sensory evoked response
Related Phrases
  • Brainstem auditory evoked potential (BAEP): A test measuring the brainstem's response to sounds.
  • Visual evoked potential (VEP): A test measuring the brain's response to visual patterns, like a flashing checkerboard.
  • Somatosensory evoked potential (SSEP): A test measuring the response to stimuli applied to the skin or nerves.
evoked potential

A scientist measures an evoked potential on a monitor during an experiment.

Noun
  1. the electrical response of the central nervous system produced by an external stimulus
    • he measured evoked potentials with an electroencephalogram