Work

Effect of changing lumbar stiffness by single facet joint dysfunction on the responsiveness of lumbar muscle spindles to vertebral movement.

Year: 2014

Type: article

Abstract: OBJECTIVE: Individuals experiencing low back pain often present clinically with intervertebral joint dysfunction. The purpose of this study was to determine whether relative changes in stiffness at a single spinal joint alters neural responsiveness of lumbar muscle spindles to either vertebral movement or position. METHODS: Muscle spindle discharge was recorded in response to 1mm L6 ramp and hold movements (0.5mm/s) in the same animal for lumbar laminectomy-only (n=23), laminectomy & L5/6 facet screw (n=19), laminectomy & L5/6 facetectomy (n=5) conditions. Mean instantaneous frequency (MIF) was calculated for the ramp-up, hold, ramp-down and post-ramp phases during each joint condition. RESULTS: Mean MIFs were not significantly different between the laminectomy-only and the other two types of joint dysfunction for the ramp-up, hold, ramp-down, or post-ramp phases. CONCLUSION: Stiffness changes caused by single facet joint dysfunction failed to alter spindle responses during slow 1mm ramp and hold movements of the L6 vertebra.

Source: Europe PMC (PubMed Central)

Authors: William R Reed, Joel G Pickar, Cynthia R Long

Institution: Palmer College of Chiropractic

Language: English

Topic: Spine and Intervertebral Disc Pathology

Subfield: Orthopedics and Sports Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: National Institutes of Health, National Center for Complementary and Integrative Health

Awards: RENOVATION OF PALMER CENTER FOR CHIROPRACTIC RESEARCH, Effect of Lumbar Hypo & Hypermobility on Sensory Responses to Spinal Manipulation