The objective of this study is to investigate the effect of incongruent and congruent visual feedback on pain reports and Pressure Pain Thresholds (PPTs).
ID
Source
Brief title
Condition
- Other condition
Synonym
Health condition
bewegingsapparaat
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
After each condition, participants will be asked two questions to assess the
perceived sensory disturbances: *How did it feel?* and *Where you aware of any
changes in your body?*. Perceived pain and/or sensory disturbances measured
will be measured with a Visual Analogue Scale.
Secondary outcome
PPTs of the lower back and dorsal part of the foot will be measured with a
digital Fisher algometer.
Background summary
Chronic low back pain (CLBP) has major public health implications, but the
theoretical framework remains elusive. It is hypothesised that sensorimotor
incongruence (SMI), an ongoing mismatch which causes deficits in sensori motor
information processing, might be a cause of long lasting pain sensations in
patients with chronic pain. Research data about experimental SMI triggering
pain in patients with chronic pain has been equivocal and evidence regarding
SMI in patients with CLBP is lacking. Additionally, there is preliminary
evidence of the analgesic effects of congruent visual feedback in patients with
spinal pain. Therefore it seems interesting to investigate the effect of
congruent and incongruent visual feedback on pain in patients with low back
pain (LBP).
Study objective
The objective of this study is to investigate the effect of incongruent and
congruent visual feedback on pain reports and Pressure Pain Thresholds (PPTs).
Study design
The study design is a randomised cross-over trial.
Intervention
Participants will randomly participate in six different visual feedback
conditions (four experimental conditions and two control conditions). Real-time
visual feedback of the lower back and left hand (control condition) will be
displayed. The image of the participant*s body will be captured using a webcam
and displayed via a vertical placed television screen placed in front of the
participant. Four experimental conditions will contain real- and distorted
visual feedback of the lower back. The real- and distorted visual feedback will
be provided in a 2x2 design: moving (side flexing of the lower back) and
standing normally. Additionally, a real and distorted image of the
participant*s left hand -a region from which it is normal to receive visual
feedback- will be displayed during the control conditions. Conditions will be
performed in a randomised order. Measurements will be taken immediately after
each condition.
Study burden and risks
Since the protocol contains a non-invasive cross-over treatment and
participants are not asked to take any drugs during or before the study, risks
associated with participation are very low. Participants will be asked to
discontinue analgesic and anti-inflammatory drugs 48 hours before testing.
Furthermore, they are restricted from physical exertion or exercise and
consumption of nicotine, alcohol and caffeine 24 hours before testing.
Participants are asked to fill in four questionnaires prior to the study and
they will visit the study location once. The total amount of time of the
procedure will be approximately 70 minutes.
Medical Campus Jette, Building F-Kine, Laarbeeklaan 103
Brussel BE-1090
NL
Medical Campus Jette, Building F-Kine, Laarbeeklaan 103
Brussel BE-1090
NL
Listed location countries
Age
Inclusion criteria
- Chronic non-specific LBP, which is defined as having back pain as the main symptom for a minimum of three months.
- Acute non-specific LBP, which is defined as having back pain as the main symptom within 6 weeks of the onset.
- Participants need to be able to read and speak the Dutch language properly.
Exclusion criteria
- Younger than 18 years old.
- Severe leg pain (NRS >7).
- Evidence of specific spinal pathology such as hernia, spinal stenosis, spondylolisthesis or spondylolysis, infection, spinal fracture or malignancy.
- Patients with spinal cancer or spinal cancer survivors (i.e. a history of cancer).
- Patients with a severe chronic disease such as a rheumatologically, cardiovascular, neurological or psychiatric disorder.
- Participants who are pregnant and until one year after giving birth.
- Participants with severe vision impairments.
- Participants suffering from epileptic insults.
- Participants who had a back surgery in the past 12 months.
- Any former experience with mirror visual feedback as a treatment.
- Sensory disturbances or pain in the left hand, since the left hand is used in the control condition.
Design
Recruitment
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| CCMO | NL52940.048.15 |