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Updated: Jun 4, 2026

A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation

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Published on: April 12, 2016

Perturbation Recovery Time Identifies Subtle Human Balance Impairments and Features.

Jiaen Wu, Michael Raitor, Takara Everest Truong

IEEE Transactions on Bio-Medical Engineering

|June 2, 2026

Summary

This summary is machine-generated.

Falls are a leading cause of injury, but early balance impairments are hard to detect. A new metric, Perturbation Recovery Time, quantifies balance recovery after disturbances, enabling early detection.

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Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

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Published on: December 11, 2013

Area of Science:

Biomechanics
Human Movement Science
Nonlinear Dynamics

Background:

Falls are a major cause of injury and healthcare costs, especially in older adults.
Early-stage balance impairments often go undetected until significant problems arise.
Quantitative balance assessment is crucial but challenging.

Purpose of the Study:

Introduce Perturbation Recovery Time (PRT), a novel balance metric.
Evaluate PRT's sensitivity in detecting balance changes.
Provide a framework for early detection of balance impairments.

Main Methods:

Developed PRT based on state-space and nonlinear dynamic system theory.
Applied external perturbations to healthy participants with induced impairments.
Analyzed key balance features: center-of-mass/pressure dynamics, angular momentum.

Main Results:

PRT quantifies the time for gait dynamics to stabilize post-perturbation.
Identified key features reflecting balance control mechanisms.
PRT reliably detected balance changes from sensory, motor, and consistency impairments.

Conclusions:

PRT is a quantitative and sensitive measure of human balance.
This metric reveals balance control mechanisms not seen in steady-state walking.
PRT offers a promising tool for early identification of balance deficits.