Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Adaptation to a novel multi-force environment.

Isaac Kurtzer1, Paul A DiZio, James R Lackner

  • 1Ashton Graybiel Spatial Orientation Laboratory, Volen Center for Complex Systems, Brandeis University, 415 South St. Waltham, MA, 02454, USA. isaac@biomed.queensu.ca

Experimental Brain Research
|April 19, 2005
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Editorial: Impact of vestibular dysfunction studies on space flight health challenges.

Frontiers in neurology·2026
Same author

Smooth pursuit eye movements contribute to long-latency reflex modulation in the lower extremity.

Journal of neurophysiology·2025
Same author

Postural stability during illusory self-motion-interactions of vision and touch.

Experimental brain research·2025
Same author

The effect of vibrotactile feedback on performance, perception and trust when balancing in different analog g-levels.

Experimental brain research·2025
Same author

Indecision under time pressure arises from suboptimal switching behavior.

Journal of neurophysiology·2025
Same author

Potential benefits and human systems integration of parastronauts with bilateral vestibulopathy for a space mission.

Frontiers in neurology·2025
Same journal

Molecular links between reelin downregulation, topoisomerase IIβ alterations, and proteins involved in Alzheimer pathology in human SH-SY5Y neuroblastoma cell line.

Experimental brain research·2026
Same journal

Motor cortex excitability during spine shape-judgment in adolescent idiopathic scoliosis: a TMS motor evoked potential study.

Experimental brain research·2026
Same journal

Trajectory dynamics and endpoint accuracy in targeted ballistic contractions.

Experimental brain research·2026
Same journal

Exploring Sevoflurane promotes hippocampal neuron mitophagy in elderly postoperative cognitive dysfunction by HSP90AA1 based on network pharmacology.

Experimental brain research·2026
Same journal

Loading modulates monosynaptic transmission from spindle primary afferents to motoneurons in humans.

Experimental brain research·2026
Same journal

Energy-dependent cortical injury thresholds in high-frequency transcortical electrical stimulation: a biophysical study in a rat model.

Experimental brain research·2026
See all related articles

Humans adapt to complex force fields by partitioning distinct force components, not just reacting to the net force. This reveals how the brain processes multiple, simultaneous forces during limb movement.

Area of Science:

  • Motor control
  • Human limb biomechanics
  • Neuroscience of movement

Background:

  • Humans exhibit precise limb control in complex, multi-force environments.
  • The neural representation of these multi-force environments remains poorly understood.
  • It is unclear if the brain processes net forces, individual components, or contextual cues.

Purpose of the Study:

  • To investigate how the human motor system represents and adapts to novel multi-force environments.
  • To differentiate between three hypotheses: partitioning of force components, net force representation, or context-cued adaptation.
  • To elucidate the neural mechanisms underlying adaptation to combined velocity-dependent and constant forces.

Main Methods:

  • Subjects performed reaching movements in a novel multi-force environment combining velocity-dependent and constant forces.
Keywords:
NASA Discipline NeuroscienceNon-NASA Center

Related Experiment Videos

  • Experimental designs dissociated force components from the net force and removed contextual cues.
  • Adaptation aftereffects were measured after exposure to the multi-force fields.

    • Main Results:

    • Adaptation aftereffects indicated that the velocity-dependent force component was processed independently from the net force.
    • Aftereffects were consistently observed opposite to the velocity-dependent component, regardless of the net force direction.
    • Further experiments suggested partitioning occurs within a limb-based coordinate frame relative to background load.

    Conclusions:

    • The human motor system actively partitions distinct force components within a multi-force field.
    • This partitioning mechanism allows for flexible adaptation to complex motor environments.
    • Limb movement adaptation involves separating forces based on their characteristics and reference frames.