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CompletedNCT01512576Updated Jan 19, 2012

Does Acupuncture Activate Endogenous Pain Inhibition in Chronic Whiplash?

A Phase 2 interventional study of acupuncture and relaxation in Whiplash, sponsored by Vrije Universiteit Brussel. Completed at 1 site in Belgium. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2012-01-19.

Sponsored by Vrije Universiteit Brussel · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
39
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

This physiological study examines whether acupuncture exerts short-term effects of analgesic mechanisms in patients with chronic whiplash pain. More specifically, it is examined whether acupuncture activates brain-orchestrated pain inhibitory action.

Read the detailed description

Many patients with chronic pain, including those with chronic whiplash-associated disorders (WAD), show features of central sensitization (CS), a process characterized by generalized hypersensitivity of the somatosensory system. it would be worthwhile identifying treatments able of activating the dysfunctional endogenous pain inhibition in patients with CS and chronic WAD.

Acupuncture is a treatment method widely used for patients with chronic pain, including those with chronic WAD. The effectiveness of acupuncture for the treatment of chronic (neck) pain is supported by several randomized controlled clinical trials, systematic reviews including meta-analyses. However, the effect-sizes are rather small and only short-term effects have been shown consistently.

A randomized cross-over trial comparing acupuncture with relaxation is conducted in order to examine whether acupuncture vs. relaxation for patients with chronic WAD results in:

  1. Immediate activation of endogenous pain inhibition (i.e. conditioned pain modulation);
  2. Concomitant pain relief;
  3. And reduced disability level. Further it is examined whether acupuncture vs. relaxation results in different autonomic nervous system responses.
02

Conditions studied

  • Whiplash

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Keywords

  • whiplash
  • chronic pain
  • sensitization
  • treatment
  • acupuncture
  • relaxation
03

In context

Whiplash Injuries

68 studies on the registry are indexed under Whiplash Injuries; 8 are open to participants now.

This study's enrollment of 39 is below the median of 68 across 49 interventional studies indexed under Whiplash Injuries.

Browse Whiplash Injuries studies →

Lead sponsor

Vrije Universiteit Brussel is the lead sponsor of 154 studies on the registry; 43 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • a diagnosis of chronic WAD grade 1 to 3 according to the criteria as defined by the Quebec Task Force classification
  • chronic neck pain and WAD persisting for at least 3 months
  • age between 18 and 65 years

Exclusion criteria

Exclusion Criteria:

  • classified as WAD grade 4 (neck complaints including fracture or dislocation, or injury to the spinal cord)
  • pregnant
  • initiated a new conventional therapy during the study period
  • taking analgesic drugs 48 hours before testing and/or nicotine, alcohol and caffeine 24 hours before testing
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Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
39 participants (actual)

Study arms

  • Experimental
    acupuncture

    All patients were treated at the basic points bilaterally situated in the local region (neck), distal region (low back, arms and legs) and ear. In addition, acupuncture treatment was performed according to the rules of traditional Chinese medicine and was semi-standardized. This means that the therapist was allowed to choose from a list of the following acupuncture points: GV14, Huatuojiaji C1-C7, GB20, SI11, GB21, TE15, SI14, BL17, MT10, SI3, BL64, TE5, GB41, Zero point, Jerome point, C0. The combination of acupuncture points were chosen individually, according to the patients' self-reported symptoms. In order to obtain the required information, patients had to fill out a Margolis pain diagram, and the acupuncturist questioned the patient and performed a tongue- and pulse diagnosis.

    Other: acupuncture

  • Active comparator
    relaxation

    For the relaxation treatment the method of guided imagery is applied. Guided imagery is a system of visualization. During guided imagery relaxation, the patient's state of consciousness is similar to one which occurs in meditative status. Patients are instructed to listen to a CD with relaxation music (Arcade TV-CD Ad Vissesr's Brainsessions, track 3). Patients will sit in an identical position like during the acupuncture treatment (i.e. on a relaxation chair) and listened to the audio CD by headphone.

    Behavioral: relaxation

Interventions

  • Otheracupuncture

    one 30-minute treatment session using sterile 1-time-use needles (Euro-acupuncture needles) were used, but the therapist was allowed to chose the needle length and diameter

    Also known as: complex somatosensory stimulation

  • Behavioralrelaxation

    1 treatment session of 30 minutes

    Also known as: visualization

06

What researchers measure

Primary outcomes

  1. the change in Conditioned pain modulation

    For assessing CPM, the method examining the influence of the Diffuse Noxious Inhibitory Control system (or spatial summation) on temporal summation (TS) was applied. The experimental pain assessments before and after each treatment were carried out by the same assessor.

    Time frame: measured prior to (week 1 and week 2) and immediately following (week1 and week 2) each treatment session

Secondary outcomes

  1. the change in Neck Disability Index (NDI)

    The Neck Disability Index (NDI) was developed in 1991 as a modification of the Oswestry Back Pain Index and was the first instrument designed to assess self-rated disability in patients with neck pain. The NDI is scored from 0 (good function) to 50 (poor function) and when multiplied by two the percentage of disability can be obtained. The NDI is a valid and reliable instrument, sensitive to measure changes within a population of patient with neck pain.

    Time frame: measured prior to (week 1 and 2) and immediately following (week 1 and 2) each treatment session

  2. the change in autonomic activity

    For measuring autonomic activity, the Nexus 10 device (Mind Media, the Netherlands) will be used. Skin conductance, body temperature, heart rate, blood volume pressure and heart rate variability will be measured continuously in real time during CPM and during both treatment sessions. Electrodes will be placed on the left hand in all patients.

    Time frame: week 1 and 2 : measured continuously in real time during CPM and during both treatment sessions

  3. the change in scores obtained from the Whiplash Associated Disorders Symptom List

    The Whiplash Associated Disorders Symptom List is a self-reported measure for assessing symptom severity in WAD patients. The questionnaire is composed of the most frequently reported WAD symptoms in the literature and some autonomic symptoms. Every symptom is presented by a visual analogue scale (VAS) (100 mm), a method that is known for its validity and reliability.

    Time frame: measured prior to (week 1 and 2) and immediately following (week 1 and 2) each treatment session

07

Study locations

1 site
  • Vrije Universiteit Brussel
    Brussel, B-1050, Belgium
08

References and documents

Publications

  • Nijs J, Meeus M, Van Oosterwijck J, Roussel N, De Kooning M, Ickmans K, Matic M. Treatment of central sensitization in patients with 'unexplained' chronic pain: what options do we have? Expert Opin Pharmacother. 2011 May;12(7):1087-98. doi: 10.1517/14656566.2011.547475. Epub 2011 Jan 22. PubMed 21254866 ↗
  • Nijs J, Van Oosterwijck J, De Hertogh W. Rehabilitation of chronic whiplash: treatment of cervical dysfunctions or chronic pain syndrome? Clin Rheumatol. 2009 Mar;28(3):243-51. doi: 10.1007/s10067-008-1083-x. Epub 2009 Jan 22. PubMed 19160000 ↗
  • Nijs J, Inghelbrecht E, Daenen L, Hachimi-Idrissi S, Hens L, Willems B, Roussel N, Cras P, Wouters K, Bernheim J. Recruitment bias in chronic pain research: whiplash as a model. Clin Rheumatol. 2011 Nov;30(11):1481-9. doi: 10.1007/s10067-011-1829-8. Epub 2011 Aug 19. PubMed 21853277 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 19, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01512576
Lead sponsor
Vrije Universiteit Brussel
Responsible party
Jo Nijs (Associate professor, Vrije Universiteit Brussel) — Principal investigator
First posted
Jan 19, 2012
Start date
Jan 2011
Primary completion
Dec 2011
Completion
Dec 2011
Last update
Jan 19, 2012

Study contacts

Jo Nijs, PhD
principal investigator · Vrije Universiteit Brussel

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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