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This observational study aims to learn how to measure joint motion and tissue response when pressure is applied to the back and examine how the nervous system responds to the applied pressure. This pressure or mobilization technique is a standard care but we currently do not have a method to measure this technique. Through this study, we hope to validate a tool that allows physical therapists to measure the pressure applied during spinal mobilization.
Participants will be asked to:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Healthy Participants | Spinal mobilization |
| |
| Chronic Low Back Pain Participants | Spinal mobilization |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Spinal mobilization | Procedure | The application of manual pressure to stiff spinal segments to improve mobility and control pain. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Joint displacement as measured by the laboratory methods and from the lumbar mobilization feedback system. | The amount of joint motion for a given grade as measured by the laboratory methods and from the lumbar mobilization feedback system. | Change from Baseline (day1) to immediately post-treatment (day 1) |
| Applied forces as measured by the laboratory methods and lumbar mobilization feedback system | The magnitude of force produced by the clinician for each grade as measured by the laboratory methods and lumbar mobilization feedback system | Change from Baseline (day1) to immediately post-treatment (day 1) |
| Tissue resistance as measured by laboratory methods and the lumbar mobilization feedback system | The degree of stiffness of the joint measured as measured by laboratory methods and the lumbar mobilization feedback system | Change from Baseline (day1) to immediately post-treatment (day 1) |
| Change in muscle activation as measured by electromyography | Differences in recorded electromyography (EMG) activity before and after administration of the intervention | Change from Baseline (day1) to immediately post-treatment (day 1) |
| Change in pain threshold as measured by quantitative sensory testing. | The following tests will be used to test sensation threshold before and after grade I - IV mobilization/clinician: pressure pain threshold, conditioned pain modulation, and temporal summation. | Change from Baseline (day1) to immediately post-treatment (day 1) |
| Brain functional connectivity as measured by functional near infrared spectroscopy |
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Inclusion Criteria:
Exclusion Criteria:
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A convenience sample of healthy subjects (faculty and students, n=25) and subjects with chronic low back pain (n=25) will be recruited from the KUMC campus. Subjects will be excluded if they report lumbar bony or joint pathology (i.e. osteoporosis, rheumatoid arthritis), lumbar/sacral deformities (i.e. spondylolisthesis, spina bifida), spinal surgery, have BMI >30, or are pregnant.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Kansas Medical Center | Kansas City | Kansas | 66103 | United States |
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Functional near infrared spectroscopy (fNIRS) is a portable, non-invasive, and inexpensive brain imaging method of monitoring cerebral hemodynamic activity. |
| Change from Baseline (day1) to immediately post-treatment (day 1) |
| ID | Term |
|---|---|
| D017116 | Low Back Pain |
| ID | Term |
|---|---|
| D001416 | Back Pain |
| D010146 | Pain |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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