Comparison of Balance Changes After Chiropractic Adjustments in Health Adults.

Study Overview
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Brief Summary
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This study will examine the effect of upper and lower extremity manipulations on an upper extremity balancing task.

Detailed Description
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Spinal manipulation has long been thought to have beneficial effects on posture, balance and proprioception; however, only a single study has investigated the effect of chiropractic treatment of the extremities on balance and posture. In a previous study, it was noted that lower extremity manipulation led to more ordered behavior on a dynamic, lower extremity balance task. It was also found that upper extremity manipulation led to less ordered behavior with same lower extremity balance task. Further studies are needed not only to validate this theory, but to further clarify the mechanism regarding specificity of manipulation to task.

Official Title
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Immediate Impact of Extremity Manipulation on an Upper Extremity (UE) Balancing Task

Conditions
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Postural Balance, Musculoskeletal Manipulation

Intervention / Treatment
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* Other: Upper extremity manipulation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Between the age 18 years old and 35 years old Cleared to be treated in Parker Wellness Clinic Exclusion Criteria: Hx of neurological disorders Hx of musculoskeletal disorders/injuries that could impact his/her ability to stand upright Currently known to be pregnant Compromised vision (beyond the wearing of corrective lenses)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Interventional Model Description: The study will be a patient and outcome assessor blinded, cross-over randomized clinical trial. Participants will randomized into two groups.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Upper Extremity Group, Day 1<br>Day 1: This group will receive a pre-test, upper extremity intervention, and post-test. Day 2: This group will receive a pre-test, lower extremity intervention, and post-test. | Other: Upper extremity manipulation<br>* An upper extremity (glenohumeral, humeroulnar and radioulnar joints, bilaterally) or a lower extremity (coxofemoral, tibiofemoral, and tibiotalar, bilaterally) manipulation series.<br>* Other names: Manipulation;|
| Experimental: Lower Extremity Group, Day 2<br>Day 1: This group will receive a pre-test, lower extremity intervention, and post-test. Day 2: This group will receive a pre-test, upper extremity intervention, and post-test. | Other: Upper extremity manipulation<br>* An upper extremity (glenohumeral, humeroulnar and radioulnar joints, bilaterally) or a lower extremity (coxofemoral, tibiofemoral, and tibiotalar, bilaterally) manipulation series.<br>* Other names: Manipulation;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Head Sensor to calculate angle of head inclination | There will be a sensor placed on each participant's head (in a neoprene headband), as well as on the midpoint of the tube. The head sensor will be used to calculate the angle of head inclination. The sensor on the tube will be used to calculate Sample Entropy as well as general kinematics. | 30 seconds | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Ground reaction force | Participants will be standing on a force plate that will characterize their ground reaction forces, eyes open without tube (EONT) versus eyes closed without the tube (ECNT). | less than 1 minute | 
| Center of pressure | Participants will be standing on a force plate that will characterize their center of pressure, EONT versus eye open with the tube horizontally (EOWT). | less than 1 minute | 
| Velocity to measure sway. | Participants will be standing on a force plate that will characterize their velocity of sway, EOWT versus eye closed with tube held horizontally (ECWT). | less than 1 minute | 
| Sway: measuring distance | Participants will be standing on a force plate that will characterize their distance of sway, EOWT versus ECWT. | less than 1 minute | 
| acceleration to measure sway | Participants will be standing on a force plate that will characterize their acceleration of sway, EOWT versus ECWT. | less than 1 minute | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Chiropractic manipulation, Extremity manipulation, Balance task