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The somatosensory cortex receives information about motor output
Tatsuya Umeda1,2, Tadashi Isa2,3,4,5,6, Yukio Nishimura2,6,7,8
1Department of Neurophysiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan.
Science Advances
|July 17, 2019
Summary
The somatosensory cortex (S1) integrates motor commands and sensory feedback during movement. S1 processes motor output information before sensory feedback arrives, indicating active, anticipatory processing.
Area of Science:
- Neuroscience
- Motor Control
- Somatosensory System
Background:
- The somatosensory system actively processes sensory information during movement through motor system interactions.
- Understanding the precise timing and nature of somatosensory information during movement remains an open question.
Purpose of the Study:
- To investigate how the primary somatosensory cortex (S1) integrates motor and sensory information during voluntary movement.
- To elucidate the temporal dynamics of signal processing within S1 during distinct phases of movement.
Main Methods:
- Simultaneous electrophysiological recordings from the primary somatosensory cortex (S1), motor cortex (MCx), and afferent neurons in behaving monkeys.
- Application of a decoding algorithm to analyze neural activity patterns and information content.
Main Results:
- S1 activity before movement initiation is explained by motor cortex (MCx) activity alone.
- During movement, S1 activity is influenced by both MCx and afferent (sensory feedback) activities.
- Premovement S1 activity encodes information about upcoming muscle activity shortly after the MCx, preceding sensory feedback arrival.
Conclusions:
- The primary somatosensory cortex (S1) receives motor output information before sensory feedback signals.
- S1 actively processes somatosensory signals in real-time, integrating anticipatory motor information with sensory feedback.
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