Evaluation of Dynamic Stability in the Low Back Pain Patient

N/ACompletedNCT02059317

Centre Hospitalier Universitaire de Nīmes70 enrolled

Overview

The main objective of this study is to compare on day 0 the maximum Lyapunov exponent (lmax, an indicator of local dynamic stability) of chronic low back pain patients versus that of healthy volunteers matched for age (± 5 years), sex and body mass index (BMI ± 15% of low back pain patients).

The secondary objectives of this study are: To compare lmax in the different experimental conditions within each group (chronic lower back pain patients, healthy volunteers). To compare changes in lmax for low back pain patients at D7 and 6 weeks.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Low Back Pain Chronic Low Back Pain

Interventions

Flexion-extension in the sagittal planeOTHER

The movement required is a flexion - extension where the subject touches a target (adapted to his/her morphology) with both index fingers: the target is positioned in front of the subject, inline with his/her outstretched arms and at knee height. This movement simulates a lifting task without weight. The movement is repeated 30 times with a return to the initial position at a frequency of 0.32Hz.

Rotation in a transverse planeOTHER

The movement required of the subject is a rotational movement where the subject alternately touches with his/her left and right hands two targets. The latter are positioned horizontally on either side of the subject at shoulder height and at arm's length. The movement is repeated 30 times at a frequency of 0.28 Hz.

Complex movement in three dimensions

Eligibility

Sex: ALLMin age: 18 YearsMax age: 75 YearsHealthy volunteers:

Medical Language ↔ Plain English

General inclusion criteria: * The patient/subject must have given his/her informed and signed consent * The patient/subject must be insured or beneficiary of a health insurance plan Inclusion criteria for low back pain patients: * The patient has chronic low back pain lasting for more than 6 months and which is not postoperative in nature General exclusion criteria: * The patient/subject is participating in another study * The patient/subject is in an exclusion period determined by a previous study * The patient/subject is under judicial protection, under tutorship or curatorship * The patient/subject refuses to sign the consent * It is impossible to correctly inform the patient/subject * The patient/subject is pregnant, parturient, or breastfeeding Exclusion criteria for low back pain patients: * The patient has a history of spinal surgery * The patient has a history of preexisting postural disorder related to lumbalgia * The patient has undergone a localized infiltration treatment (e.g. cortisone shots) in the last month * The subject has a balance disorder, blindness, inability to carry out the experimental protocol Exclusion criteria for healthy volunteers: * The subject has a history of acute low back pain \> 15 days or which has resulted in a work stoppage of more than 7 days in the 5 years preceding the study

Locations (1)

CHRU de Nîmes - Hôpital Universitaire Carémeau

Nîmes, France