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Motor congruency and multisensory integration jointly facilitate visual information processing before movement
J A Elshout1, N Van der Stoep2, T C W Nijboer2,3
1Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands. j.a.elshout@uu.nl.
Experimental Brain Research
|February 10, 2020
Summary
Multisensory integration (MSI) and congruent motor actions synergistically enhance visual attention. This combined effect boosts sensory processing beyond motor control alone, improving performance before movement execution.
Area of Science:
- Cognitive Neuroscience
- Human Motor Control
- Sensory Processing
Background:
- Attention enhances sensory information processing and is coupled with motor systems.
- Motor congruent eye-hand movements and multisensory integration (MSI) individually boost attention.
- The combined synergistic effects of MSI and motor congruency on attention remain largely unexplored.
Purpose of the Study:
- To investigate if combining multisensory integration (MSI) and motor congruency synergistically enhances visual information processing.
- To compare the effects of combined MSI and motor congruency against motor congruency alone.
- To determine if performance enhancements exceed the sum of individual effects.
Main Methods:
- Participants performed a 2-alternative forced-choice (2-AFC) visual discrimination task.
- Congruent eye- and hand-movements were executed towards a movement target location.
- Three auditory-visual conditions were tested: no sound, spatially/temporally aligned sound (MSI), and temporally misaligned sound (no MSI).
Main Results:
- Visual discrimination performance was significantly enhanced at the movement-relevant location when congruent motor actions and MSI coincided.
- The combined effect of motor congruency and MSI surpassed the enhancement observed with motor congruency alone.
- Performance gains were evident during the pre-movement planning phase.
Conclusions:
- The synergy between congruent motor actions and MSI significantly enhances visual information processing.
- Attention's processing boost is not maximal and can be further amplified by combining motor and sensory congruency.
- These findings highlight the powerful interplay between motor planning, sensory integration, and attentional mechanisms.
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