Effect of Lumbar Surgery on Complexity During a Walking Task in Chronic Low Back Pain

Recruiting now

Conditions studied: Low Back Pain

In brief

Lumbar surgery is the most common treatment for chronic disabling low back pain with degenerative disc disease. There are few elements to objectively evaluate the improvement of the motor control after surgery and the motor adaptation capacities of the patients. The impact of lumbar surgery on complexity in this painful context has never been studied. Theoretically, the restriction of mobility imposed by lumbar surgery should limit the subject's adaptive capacities (of one or more lumbar segments) and thus reduce complexity. Nevertheless, improvement in pain intensity levels could allow the patient to find better motor adaptation capacities, necessary for a positive evolution in the long-term. The aim of this study was to investigate the evolution of gait complexity in chronic low back pain patients pre- and post-surgery. If surgery improves the adaptability of walking through an antalgic benefit exceeding the induced stiffness, the complexity of walking should be superior after surgery. This is a proof-of-concept study in which the study investigators hypothesize that measuring complexity by fractal analysis during a walking task will show the increase in gait complexity induced by lumbar surgery at 3 and 6 months after surgery.

Key facts

Study ID: NCT05231265
Run by: Centre Hospitalier Universitaire de Nīmes
People needed: 32
Starts: 2023-10-16
Expected to finish: 2027-04-01
Last updated by the study team: 2026-06-01

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Patients with chronic low back pain requiring prosthesis or arthrodesis surgery on one or two levels
Subject affiliated or beneficiary of a health insurance plan.
The patient must have given their free and informed consent

You may not qualify if…

Patients with organic low back pain (infection, tumor, inflammatory rheumatism)
Patient with a neurological deficit (cauda equina syndrome or motor testing MRC < 3 on a muscle group of the lower limbs)
Patient who has already undergone lumbar surgery (except single discectomy)
Patient with serious concomitant pathologies
Patients participating in a therapeutic study prohibiting participation in another study
Patient in an exclusion period from a different study
It is impossible to give the subject informed information
Patient is unable to express consent
The patient is under safeguard of justice or state guardianship
Patient is pregnant, parturient or breastfeeding

Where it is running

CHU Nîmes — Nîmes, France (enrolling)
Polyclinique Grand Sud — Nîmes, France

Full record on ClinicalTrials.gov

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