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Related Experiment Videos

Interlimb co-ordination in human infant stepping.

M Y Pang1, J F Yang

  • 1Department of Physical Therapy and University Centre for Neuroscience, University of Alberta, Edmonton, Alberta, Canada T6G 2G4.

The Journal of Physiology
|June 5, 2001
PubMed
Summary

Infants coordinate limb movements during stepping, even when one limb is disturbed. This study shows early bilateral motor control before walking begins.

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Area of Science:

  • Developmental neuroscience
  • Motor control
  • Human locomotion

Background:

  • Infant stepping is a precursor to walking.
  • Understanding early motor coordination is crucial for developmental studies.

Purpose of the Study:

  • To investigate bilateral limb coordination in infants during stepping.
  • To analyze infant responses to unilateral limb perturbations.

Main Methods:

  • Infants (4-12 months) were observed over a treadmill.
  • Manual disturbances were applied to one limb during stance and swing phases.
  • Muscle activity and limb movements were recorded from both lower limbs.

Main Results:

  • Unilateral perturbations elicited coordinated bilateral responses.
  • Contralateral limb adjusted ground contact or stance duration.
  • Bilateral simultaneous stance was achievable, but simultaneous swing was difficult.
  • Rhythmic stepping quickly resumed after perturbations.

Conclusions:

  • Human infants exhibit bilateral motor coordination before independent walking.
  • Early motor responses demonstrate sophisticated interlimb coordination capabilities.

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