Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

Pinch force matching errors predicted by an equilibrium-point model

C L Van Doren¹

¹Department of Orthopaedics, Case Western Reserve University, Cleveland, OH 44106, USA.

Experimental Brain Research

|January 1, 1995

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

Effectiveness of supplemental grasp-force feedback in the presence of vision.

Medical & biological engineering & computing·2000

Same author

A high voltage, constant current stimulator for electrocutaneous stimulation through small electrodes.

IEEE transactions on bio-medical engineering·1999

Same author

Satisfaction with and usage of a hand neuroprosthesis.

Archives of physical medicine and rehabilitation·1999

Same author

Grasp stiffness as a function of grasp force and finger span.

Motor control·1998

Same author

Differential effects of load stiffness on matching pinch force, finger span, and effort.

Experimental brain research·1998

Same author

Contours of equal perceived amplitude and equal perceived frequency for electrocutaneous stimuli.

Perception & psychophysics·1997

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

Subjects matched grip forces to external loads, often exaggerating or underestimating based on load stiffness. These findings align with an equilibrium point model of muscle control, revealing insights into human motor control and pinch stiffness.

Area of Science:

Neuroscience
Biomechanics
Motor Control

Background:

Grasp force and finger span adjustments are crucial for object manipulation.
External load properties like size and stiffness can systematically influence grip force and span matching accuracy.

Purpose of the Study:

To investigate how humans match grip forces and finger spans when interacting with loads of varying stiffness.
To determine if matching is based on perceived force or central motor commands.

Main Methods:

Subjects performed a three-finger pinch to generate and match a reference force against compliant or rigid loads.
Matching was performed simultaneously with force generation, with a 1-second time limit and unknown reference hand.

Main Results:

Related Experiment Videos

Forces were exaggerated when matching a compliant load to a rigid one, and underestimated in the reverse scenario.
Matching errors increased with load compliance and reference force, with a consistent left-hand bias observed.
Results align with the equilibrium point (lambda) model, suggesting central command shifts in muscle rest length.

Conclusions:

Human grip force matching appears to rely on central motor commands rather than precise force perception under rapid, uncertain conditions.
The equilibrium point model effectively predicts observed matching behaviors, supporting its role in understanding muscle control.
Muscle compliance characteristics, specifically an accelerating function, are crucial for accurately modeling pinch stiffness and motor control.