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Related Experiment Video

Updated: May 29, 2026

The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors

The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors

Published on: May 2, 2021

Motor control strategies in a continuous task space.

Christoph Schütz¹, Matthias Weigelt, Dennis Odekerken

¹Faculty of Psychology and Sport Sciences, Bielefeld University, Bielefeld, Germany.

|September 1, 2011

Summary

This summary is machine-generated.

This study investigated human grasping behavior in continuous tasks. Findings show that end-state comfort and hysteresis effects persist in predictable scenarios, while only end-state comfort appears in unpredictable ones.

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Area of Science:

Motor control
Human grasping behavior
Perceptual-motor tasks

Background:

Previous research on sequential grasping effects was limited to binary grasp selections.
Established motor control strategies like end-state comfort and hysteresis effects were explored in continuous tasks.

Purpose of the Study:

To determine if end-state comfort and hysteresis effects apply to sequential motor tasks with continuous solutions.
To investigate the influence of predictability on these motor control strategies.

Main Methods:

Participants performed sequential (predictable) and randomized (nonpredictable) perceptual-motor tasks.
These tasks allowed for a continuous range of posture solutions for each movement.
The presence of end-state comfort and hysteresis effects was analyzed.

Main Results:

Both end-state comfort and hysteresis effects were observed under predictable, continuous conditions.
Only the end-state comfort effect was evident under nonpredictable conditions.
A work range restriction effect was identified and reproduced for both dominant and non-dominant hands.

Conclusions:

End-state comfort and hysteresis effects are adaptable to continuous motor tasks, with predictability playing a key role.
The findings extend the understanding of motor control strategies beyond binary selections.
The work range restriction effect is a robust phenomenon in human grasping.