Reactive foot placement in balance control during standing and walking in healthy young adults and stroke survivors.

Completed

Conditions: 10007963
motor control
stroke

Registration Number: NL-OMON44237

Lead Sponsor: niversiteit Twente

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Completed

Sex: Not specified

Target Recruitment: 70

Inclusion Criteria

Healthy:
Subjects of age 18-40 years;Stroke:
Between 18 and 70 years of age
Diagnosed with a hemiparesis as the result of a first ever ischemic stroke
>6 months post-stroke (chronic stage)
functional ambulation category (FAC) 4: walk independently on level surfaces
physical condition allows independent walking for at least 3 consecutive minutes
stable medical condition
sufficient cognitive abilities (MMSE><=22)
sufficient communication abilities (UCO ><= 3);Both:
Body weight<100 kg
Written informed consent

Exclusion Criteria

Healthy:
current lower extremity problems or deficiencies (e.g. problems with walking)
(history of) neurological or balance related disorders;Stroke:
(history of) neurological or balance related disorders not related to stroke;Both:
using medication that can affect balance control
pregnancy
chronic joint pain
orthopedic problems
(history of) cardiac conditions that interfere with physical load
(history of) skin diseases

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The main parameters under study are stepping location (length, width) and swing<br /><br>time (time between toe-off and heel strike).</p><br>

Secondary Outcome Measures

Name	Time	Method
<p>Secondary endpoints are the distance between center of mass and center of<br /><br>pressure, ground reaction forces of the stance leg(s), joint angles and joint<br /><br>torques, body momentum, body sway in the frontal plane, and muscle (reflexive)<br /><br>activity as resulting from an externally applied perturbation and during the<br /><br>balance recovery thereof, as well as their relation to the primary study<br /><br>parameters.<br /><br>The study parameters will be incorporated in a mathematical explanatory model<br /><br>that describes the relations between the main and secondary study parameters,<br /><br>both for healthy subjects and stroke survivors. This way, human-like stepping<br /><br>behavior might be predicted given the observed related quantities. Furthermore,<br /><br>data collected in experiments done with and without the balance device, will be<br /><br>compared in order to evaluate the contribution of the inertial flywheel<br /><br>actuator in helping subject to keep balance.</p><br>