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Area of Science:

  • Neuroscience
  • Motor Control
  • Perception

Background:

  • The link between action and perception is well-established, but underlying mechanisms remain unclear.
  • The central nervous system (CNS) may simplify sensorimotor integration by selecting movements that optimize sensory input sampling.
  • Prior research focused on higher-level motor behaviors, neglecting lower-level motor control organization.

Purpose of the Study:

  • To investigate the role of lower-level motor control organization in active perception.
  • To test if coordinated muscle recruitment (motor modules) during force exertion influences force perception.

Main Methods:

  • Participants performed a motor task involving counteracting an external force.
  • Statistical models were used to assess the contribution of motor modules to perceptual variance.
  • Compared a motor module-based model against an alternative model.

Main Results:

  • A model based on motor module modulation explained approximately 70% of perceptual variance.
  • An alternative model, not based on motor modules, explained significantly less perceptual variance.
  • Muscle activation patterns significantly predict force perception.

Conclusions:

  • Motor module organization plays a crucial role in the active perception of force.
  • Modular motor control may mediate both muscle coordination and perceptual inference.
  • Findings highlight the importance of lower-level motor control in sensorimotor integration.