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

Feedforward stabilization in a bimanual unloading task.

P S Lum1, D J Reinkensmeyer, S L Lehman

  • 1Graduate Group on Bioengineering, University of California, Berkeley 94720.

Experimental Brain Research
|January 1, 1992
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

Deep Learning on Histology Images for Differentiating Fibro-osseous Lesions of the Jaw.

Journal of dental research·2026
Same author

Effects of a commercial buckwheat rhizome flavonoid extract on milk production, plasma pro-oxidant and antioxidant, and the ruminal metagenome and metabolites in lactating dairy goats.

Journal of dairy science·2025
Same author

[Association of age at menarche, age at menopause, and reproductive lifespan with frailty index in Chinese adult women].

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi·2025
Same author

[Feasibility and safety of laparoscopic purse-string suture clamps and multi-functional seal caps for total laparoscopic radical total gastrectomy].

Zhonghua wei chang wai ke za zhi = Chinese journal of gastrointestinal surgery·2025
Same author

[Evaluation of high-risk HPV genotyping detection in cervical cancer screening based on a prospective cohort study].

Zhonghua zhong liu za zhi [Chinese journal of oncology]·2025
Same author

[Incidence of diabetes and influencing factors in HIV-infected individuals after antiretroviral therapy in Dehong Dai and Jingpo Autonomous Prefecture].

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi·2024
Same journal

Changes in synergy formation and modulation during cyclic finger force production tasks in female adults with dystonic cerebral palsy.

Experimental brain research·2026
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
See all related articles

Motor commands use feedforward control to stabilize the hand during unloading. This neural command increases with unloading rate but becomes less effective at higher rates, indicating limitations in motor control.

Area of Science:

  • Motor control and neuroscience
  • Human biomechanics and movement science

Background:

  • The human motor system employs feedforward control to maintain limb stability during dynamic tasks.
  • Understanding the neural mechanisms underlying anticipatory postural adjustments is crucial for explaining motor performance.

Purpose of the Study:

  • To investigate the role of feedforward motor commands in stabilizing the unloaded hand during load removal.
  • To examine how different unloading rates and unexpected force uncoupling affect hand stabilization.

Main Methods:

  • Utilized a novel apparatus for controlled unloading of the hand at various rates.
  • Introduced unexpected uncoupling of the unloading force from the postural hand to challenge feedforward control.
  • Monitored muscle activity (agonist and antagonist) and hand position during the task.

Related Experiment Videos

Main Results:

  • All subjects demonstrated feedforward stabilization of the unloaded hand position.
  • Stabilization involved both deactivation of agonist and activation of antagonist postural muscles.
  • The magnitude of the feedforward neural command increased with the rate of unloading.
  • Stabilization effectiveness decreased as the unloading rate increased, with incomplete cancellation of interaction torque.

Conclusions:

  • Feedforward motor control plays a significant role in stabilizing the hand during unloading tasks.
  • The neural command for stabilization scales with unloading rate but has limitations in counteracting interaction torques.
  • Increased unloading rates lead to reduced stabilization effectiveness, highlighting the constraints of predictive motor control.