The alpha rhythm: from physiology to behavior
Ole Jensen1,2, Mathilde Bonnefond3
1Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Department of Psychiatry, University of Oxford, Oxford, United Kingdom.
Physiological Reviews
|February 3, 2026
Summary
Alpha oscillations, a brainwave pattern, are not just for rest but actively support cognitive tasks by inhibiting irrelevant brain areas. Understanding alpha rhythm modulation offers insights into attention deficits and aging.
Area of Science:
- Neuroscience
- Cognitive Science
- Electrophysiology
Background:
- The alpha rhythm is a key electrophysiological signature of the awake human brain.
- Historically viewed as a sign of rest, recent research shows alpha oscillations increase with cognitive demands.
- This shift redefines alpha's role from idling to active cognitive processing.
Purpose of the Study:
- To review the physiological mechanisms generating alpha oscillations.
- To explore how alpha oscillations are modulated across cognitive tasks.
- To investigate the link between alpha rhythm dysfunction and attention-related disorders.
Main Methods:
- Literature review of physiological mechanisms and computational models of alpha rhythm generation.
- Analysis of behavioral studies demonstrating alpha oscillation modulation in cognitive paradigms.
- Examination of research on attention-related issues and alpha oscillation impairment.
Main Results:
- Alpha oscillations actively inhibit task-irrelevant brain regions, optimizing resource allocation.
- Alpha rhythm modulation is a consistent feature across diverse human cognitive tasks.
- Impaired alpha oscillation modulation is linked to performance deficits in attention-related disorders.
Conclusions:
- Alpha oscillations play a crucial role in cognitive function by regulating brain activity.
- Studying alpha rhythms can elucidate mechanisms behind attention problems like ADHD and aging.
- Technological advances enable new research into alpha oscillations in naturalistic settings and across the lifespan.
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