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Related Experiment Video

Updated: May 11, 2026

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

Published on: November 6, 2015

Multi-joint coordination of functional arm reaching: induced position analysis.

Wei Liu¹, Jill Whitall, Thomas M Kepple

¹Department of Kinesiology, College of Education, Auburn University, AL, USA.

Journal of Applied Biomechanics

|May 7, 2013

Summary

Induced position analysis helps understand arm reaching by examining shoulder and elbow movements. This method reveals how joint moments contribute to hand positioning during forward reaching tasks.

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Last Updated: May 11, 2026

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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

Area of Science:

Biomechanics
Human motor control
Robotics

Background:

Functional arm reaching is a complex motor task involving coordinated movements of the shoulder, elbow, and wrist joints.
Understanding the interplay between joint moments and hand trajectory is crucial for fields like rehabilitation robotics and neuroscience.

Purpose of the Study:

To introduce and validate induced position analysis as a method for quantifying multijoint coordination during arm reaching.
To determine the specific contributions of shoulder and elbow joint moments to forward hand movements.

Main Methods:

Induced position analysis was employed to calculate the influence of net joint moments on hand position during reaching.
The proposed method was validated using motion capture data to ensure accuracy and reliability.
Analysis focused on the contributions of the shoulder and elbow joints to the overall arm movement.

Main Results:

The shoulder and elbow act as the primary movers during functional arm reaching.
A distinct coordination pattern was observed, characterized by an "overshoot" at the shoulder and an "undershoot" at the elbow.
These coordinated joint actions effectively guided the hand to its final target position.

Conclusions:

Induced position analysis is a valuable tool for dissecting multijoint coordination in arm reaching.
The shoulder and elbow exhibit specific, complementary movement patterns during reaching, essential for accurate hand placement.
This analytical approach provides quantitative insights into motor control strategies during reaching tasks.