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Updated: Jan 20, 2026

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Brain Responses to Passive Sensory Stimulation Correlate With Intelligence.

Anna Horwitz1,2,3, Marc Klemp4,5, Henrik Horwitz6

  • 1Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark.

Frontiers in Aging Neuroscience
|September 3, 2019
PubMed
Summary
This summary is machine-generated.

This study links brain power responses, specifically gamma-range steady-state responses (SSRs), to intelligence. Higher SSR power differences correlate with higher intelligence scores, even in childhood.

Keywords:
EEGaginggamma powerintelligencelongitudinal intelligence scoresneurocognitive functionsteady-state evoked potentials

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychometrics

Background:

  • Investigating the neural correlates of intelligence is crucial for understanding cognitive function.
  • Previous research suggests links between brain activity and intelligence, but specific measures require further exploration.
  • Steady-state responses (SSRs) offer a quantifiable measure of neural processing.

Purpose of the Study:

  • To examine the association between intelligence and brain power responses to audiovisual stimulation.
  • To determine if gamma-range SSRs can serve as a biomarker for intelligence.
  • To explore the relationship between SSRs and intelligence across different life stages.

Main Methods:

  • Utilized a cohort of 40 healthy males born in 1953 from a Danish birth cohort study.
  • Measured intelligence and neurocognitive function, including gamma-range steady-state responses (SSRs).
  • Calculated a primary power measure as the difference between visual and audiovisual SSR power.

Main Results:

  • A highly significant positive correlation was found between the SSR power measure and current intelligence scores.
  • This association remained robust after controlling for factors like birth size, education, and processing speed.
  • Intelligence scores from childhood, youth, and midlife also correlated significantly with the present-day SSR power measure.

Conclusions:

  • The study establishes a strong, deep connection between intelligence and gamma-range steady-state responses.
  • The SSR power measure demonstrates high sensitivity in detecting below-average intelligence scores.
  • These findings suggest SSRs could be a valuable neurophysiological marker for intelligence.