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Related Experiment Video

Updated: Jun 26, 2026

An Instrumented Pull Test to Characterize Postural Responses

An Instrumented Pull Test to Characterize Postural Responses

Published on: April 6, 2019

Standing on Elevated Platform Changes Postural Reactive Responses during Arm Movement.

Luis Mochizuki^1,2, Juliana Pennone^1,2, Aline Bigongiari¹

¹School of Arts, Science and Humanities, University of São Paulo, São Paulo 03828-000, Brazil.

|October 25, 2024

Summary

This summary is machine-generated.

Postural muscle activity changes across movement phases, with higher demands on elevated platforms. Sensory and motor conditions significantly influence how the body adjusts posture.

Keywords:

EMG fear of falling posture

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Last Updated: Jun 26, 2026

An Instrumented Pull Test to Characterize Postural Responses

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Published on: April 6, 2019

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

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Published on: March 19, 2020

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Published on: July 26, 2022

Area of Science:

Biomechanics
Motor Control
Human Physiology

Background:

Postural adjustments are crucial for stable movements.
Understanding anticipatory (APA), online (OPA), and compensatory (CPA) postural adjustments is key.
Sensory feedback and base of support affect postural control.

Purpose of the Study:

Investigate postural adjustments during arm raises.
Analyze effects of reduced sensory information (eyes closed) and increased height (platform) on muscle activity.
Examine APA, OPA, and CPA phases.

Main Methods:

Eight young women performed rapid shoulder flexion.
EMG activity of trunk and lower limb muscles recorded.
Tasks performed standing on ground and 1-m elevated platform, with eyes open and closed.

Main Results:

Muscle activation patterns varied across APA, OPA, and CPA phases.
OPA showed highest muscle activity; APA showed lowest.
Elevated platform increased APA muscle activation.
Negative correlation between APA and OPA in stable conditions.

Conclusions:

Postural control adapts to sensory, motor, and cognitive factors.
Increased postural demand (height) requires greater flexibility in muscle synergies.
Altered muscle activity patterns observed under different conditions.