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Related Experiment Videos

Dynamic and kinematic strategies for head movement control.

B W Peterson1, H Choi, T Hain

  • 1Northwestern University Medical School, Chicago, Illinois 60611, USA. b-peterson2@northwestern.edu

Annals of the New York Academy of Sciences
|November 17, 2001
PubMed
Summary

This study reveals how neck muscles and reflexes control head movements, highlighting redundant control strategies for stability and adaptability in the complex head-neck system.

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Area of Science:

  • Biomechanics
  • Neuroscience
  • Human Motor Control

Background:

  • The head-neck system is complex, involving intricate interactions between biomechanical and neural factors.
  • Understanding its control mechanisms is crucial for diagnosing and treating neurological and musculoskeletal disorders.

Purpose of the Study:

  • To analyze the complex head-neck system using experimental and modeling approaches.
  • To investigate the functional contributions of biomechanically and neurally generated forces.
  • To elucidate the control strategies employed by the head-neck system during various tasks.

Main Methods:

  • Dynamical analysis of head movements and electromyography (EMG) activation.
  • Perturbation of trunk position to elicit responses.
Keywords:
NASA Discipline NeuroscienceNon-NASA Center

Related Experiment Videos

  • Kinematic studies of voluntary and reflex-driven movements.
  • Lumped system modeling with simplified kinematics.

    • Main Results:

    • Visual, voluntary, and reflex controls (vestibulocollic, cervicocollic) govern head-neck dynamics across different frequency domains.
    • Redundant control mechanisms allow for compensation of lesions and explain inter-subject variability.
    • Identified distinct strategies for voluntary force generation, head stabilization during body perturbations, and head tracking.

    Conclusions:

    • The head-neck system utilizes specific muscle synergies for efficient task execution.
    • Reciprocal and co-contraction strategies are employed for voluntary force generation.
    • Vestibulocollic reflexes stabilize the head during body perturbations, while multiple strategies exist for voluntary head tracking.