Postural Responses to External Perturbation in Post-Stroke

Not Applicable

• Conditions: Stroke
• Interventions: Other: Sensory Intervention

• Registration Number: NCT01912794
• Lead Sponsor: University of Sao Paulo

Brief Summary

To maintain stable body balance in daily activities, the ability to respond to external perturbations is an essential factor. Such capacity is limited in pathological conditions, such as in stroke, in which postural control is impaired due to lesions to the central nervous system. Impairment to postural control increases body sway during upright posture and leads to augmented frequency of falls. In this sense, the identification of mechanisms involved in body balance disorders after stroke is particularly important in situations of postural perturbation. The purpose of this project is to evaluate reactive postural responses to unpredictable external perturbations, analyzing postural dysfunctions caused by lesion to different brain areas as a result of stroke, and test principles of dynamic body balance rehabilitation.

Detailed Description

Not available

Basic Information
|
Recruitment & Eligibility
|
Study & Design
|
Trial Locations

Study Timeline

• Status Verified: 2013-07
• Study First Submitted: 2013-07-26
• Study First Submitted QC: 2013-07-29
• Last Update Submitted: 2013-07-30
• Study First Posted: 2013-07-31
• Study Start: 2013-08
• Last Update Posted: 2013-08-01
• Primary Completion: 2014-02
• Study Completion: 2014-10

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 24

Inclusion Criteria

• Inclusion criteria are as follows. Healthy participants: absence of detectable neurological or physical malfunction which might affect postural control, no use of drugs affecting body balance and preserved mental capacity. Stroke patients: capacity to sustain independently orthostatic posture for at least 5 min. and preserved mental capacity.

Read More

Exclusion Criteria

• Exclusion Criteria are: no orthopedic malfunction, no clinical instability associated with systemic disease, no use of drugs affecting body balance and presence of "pusher syndrome".

Read More

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Sensory Conditions	Sensory Intervention	-

Primary Outcome Measures

Name	Time	Method
Displacement amplitude of the CP to the anterior-posterior and medial-lateral	2 months	This outcome measure quantified by the difference between the maximum values of the anterior-posterior and medial-lateral after the start of trial and average position in the axis anteroposterior and mediolateral, respectively, in the 200 ms prior to the onset of the trial.

Secondary Outcome Measures

Name	Time	Method
Coordination between the hip and ankle joint	2 months	Coordination between the hip and ankle joints, which is evaluated by adjusting the angle displacement data, hip and ankle angle within 95% of an ellipse surrounding the values of the disturbance moment until the end of the trial. Will be carried out a regression analysis to identify the slope of the fitted ellipse. Slopes greater indicate a greater share of the ankle in relation to the hip

Trial Locations

Locations (1)

Escola de Educação física e Esporte, Universidade de São Paulo; 🇧🇷 São Paulo, Brazil