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Related Experiment Video

Updated: May 13, 2026

A Tactile Automated Passive-Finger Stimulator TAPS

A Tactile Automated Passive-Finger Stimulator TAPS

Published on: June 3, 2009

Rhythmic Fluctuations in Tactile Attention.

Burcu Bayram¹, Ulrich Ansorge^1,2,3, Ulrich Pomper¹

¹Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria.

The European Journal of Neuroscience

|September 14, 2025

Summary

This summary is machine-generated.

Tactile perception fluctuates rhythmically, similar to vision and hearing. This suggests the brain uses cyclical processing and alternating attention for somatosensory information, a potentially general brain mechanism.

Keywords:

alpha oscillations rhythmic processing spatial attention tactile

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Area of Science:

Neuroscience
Somatosensory processing
Cognitive psychology

Background:

Sensory information is increasingly understood to be processed rhythmically, reflecting neural oscillations.
Rhythmic processing is well-documented in visual and auditory systems.
Its role in the somatosensory system, crucial for bodily integrity, remains less understood.

Purpose of the Study:

To investigate if tactile detection performance fluctuates with somatosensory alpha- and beta-band oscillations.
To determine if attention samples simultaneously monitored body parts at different times, mirroring visual and auditory domains.

Main Methods:

A dense-sampling behavioral experiment using a tactile cuing task.
Participants responded to tactile vibrations at detection threshold on the left and right index fingers.
Thirty-one healthy participants (male and female) were recruited.

Main Results:

Temporal fluctuations in hit rates and response times were observed at 8-16 Hz, aligning with somatosensory alpha- and beta-band oscillations.
Phase differences (~13 Hz) in hit rate fluctuations between hands suggest alternating temporal sampling of somatosensory locations.
Evidence supports rhythmic processing and alternating attentional sampling in the somatosensory modality.

Conclusions:

Somatosensory processing exhibits rhythmic fluctuations consistent with neural oscillations.
Attentional sampling in the somatosensory system appears to occur at different time points for different body locations.
Cyclical information processing and alternating sampling may be general mechanisms across sensory modalities and brain functions.