alpha rhythm

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alpha rhythm

A person's brain shows an alpha rhythm while resting with eyes closed.

Definition

Noun: * The normal brainwave pattern recorded by an electroencephalogram (EEG) in a person who is awake but relaxed, typically occurring with a frequency of 8 to 12 cycles per second (hertz).

Usage

The term "alpha rhythm" is used in neuroscience, psychology, and medicine to describe a specific, measurable state of brain activity. * It is typically observed when the eyes are closed and the mind is in a calm, resting state, but not asleep. * A disruption or absence of the alpha rhythm can be an indicator of certain neurological conditions or states of heightened arousal.

Examples
  • Noun:
    • Meditation practices are often associated with an increase in the alpha rhythm.
    • The EEG showed a strong, regular alpha rhythm, indicating the patient was in a relaxed, wakeful state.
    • When she opened her eyes, the alpha rhythm was immediately replaced by faster beta waves.
Advanced Usage
  • "To produce/display an alpha rhythm": To generate this specific brainwave pattern.
    • The biofeedback device helps users learn how to produce an alpha rhythm.
  • "Alpha rhythm activity": Refers to the presence or measurement of these waves.
    • The study measured alpha rhythm activity in response to different types of music.
Variants and Related Words
  • Alpha wave (n): A synonym for "alpha rhythm," though sometimes used to refer to a single wave within the rhythmic pattern.
    • The presence of alpha waves is a sign of relaxed alertness.
  • Alpha state (n): The subjective mental state associated with the production of alpha rhythms.
    • He entered a deep alpha state during the relaxation exercise.
Synonyms
  • Berger rhythm: A historical term named after Hans Berger, the inventor of the EEG who first described this wave.
  • Alpha activity: A more general term for the phenomenon.
Related Concepts (Not Phrasal Verbs or Idioms)
  • Beta rhythm: Faster brainwaves (13-30 Hz) associated with active, engaged thinking and concentration.
  • Theta rhythm: Slower brainwaves (4-7 Hz) associated with drowsiness, meditation, and light sleep.
  • Delta rhythm: The slowest brainwaves (0.5-3 Hz), dominant in deep, dreamless sleep.
alpha rhythm

A person's brain shows an alpha rhythm while resting with eyes closed.

Noun
  1. the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz

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