Muscle Activation Characteristics During Spinal Manipulation in Healthy and Low Back Pain Participants

University of Denver60 enrolled

Overview

To characterize muscle activity through electromyography (EMG) of the lumbar spine during high velocity, low amplitude (HVLA) spinal manipulation according to parameters of practitioner contact (location, applied force) in healthy participants and two categories of low back pain participants.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Back Pain

Interventions

Spinal ManipulationPROCEDURE

HVLA (High Velocity Low Amplitude) spinal manipulation directed at the lumbar spine and sacroiliac (SI) joints

Eligibility

Sex: ALLMin age: 18 YearsMax age: 55 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * male and female participants ages 18 to 55 years old Exclusion Criteria: Active Worker's Compensation claim related to low back pain episode Active personal injury case related to low back pain episode Currently taking muscle relaxers, steroids, or narcotics * Body mass index \> 30 kg/m2 * Active cancer process * Active infection * Pregnancy * High risk of osteoporosis assessed using the World Health Organization Fracture Risk Assessment Tool (included in submission) * Osteogenic conditions (see screening questionnaire) * Premature menopause * Latex Allergies * Lumbar spine or pelvic surgery * Past spinal trauma producing spinal fracture

Locations (1)

University of Denver

Denver, Colorado, United States

Outcomes

Primary Outcomes

Muscle Response

Muscle activity of the lumbar spinal musculature as measured by both surface and indwelling electromyography. Total response expressed as a percentage of muscles "on".

Time frame: During spinal manipulation at the time of testing

Muscle Activity Onset Delay

Muscle activity of the lumbar spinal musculature as measured by both surface and indwelling electromyography. Time delay between the manipulation force and the muscle activity

Time frame: During spinal manipulation at the time of testing

Data from ClinicalTrials.gov

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