Definition

1. Noun:
   • A neurophysiological phenomenon: "Cortical potential" refers to the rapid, rhythmic fluctuations in electrical voltage that occur between different parts of the cerebral cortex. These fluctuations are generated by the synchronized activity of large groups of neurons and are detectable using specialized equipment like an electroencephalograph (EEG).

Examples of Usage

• Noun:
  • The EEG recorded abnormal cortical potentials during the seizure.
  • Researchers study cortical potentials to understand brain function during sleep.
  • A change in the pattern of cortical potentials can indicate neurological activity.

Advanced Usage

• "Evoked cortical potential": A specific type of cortical potential that is a direct, time-locked response to a sensory stimulus, such as a flash of light or a sound.

  • The auditory evoked cortical potential was measured to test the patient's hearing pathways.

• "Spontaneous cortical potential": Refers to the ongoing, background electrical activity of the brain not directly linked to an external stimulus.

  • The EEG primarily records spontaneous cortical potentials.

Variants and Related Words

• Electroencephalogram (EEG) (n): The graphical record or tracing produced by measuring cortical potentials.

  • The doctor analyzed the EEG to look for unusual brain waves.

• Brainwave (n): A common, less technical term for the rhythmic neural activity represented by a cortical potential.

  • The meditation app claims to help induce alpha brainwaves.

Synonyms

• Brain electrical activity: A general descriptive term.
• EEG activity: A term specifying the method of detection.

Related Phrases

• To record cortical potentials: The act of measuring this activity.

  • The experiment was designed to record cortical potentials while participants solved puzzles.

• Cortical potential mapping: The process of creating a spatial representation of this electrical activity across the scalp.

  • Cortical potential mapping can help locate the origin of epileptic activity.

Noun

1. (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph