Condition category
Musculoskeletal Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Mr Per J Palmgren


Contact details

Rasundavagen 101
Department of Research

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Cervicocephalic kinesthetic sensibility and postural balance in patients with non-traumatic chronic neck pain


Study hypothesis

The aim of the study is to investigate the head repositioning accuracy (HRA) and standing balance among patients with non-traumatic chronic neck pain. A working hypothesis formed the basis for the study: disturbed HRA and altered postural control will be present among patients with non-traumatic chronic neck pain.

Ethics approval

Research Ethical Board of the Chiropractic Association of Sweden and Institutional Review Board of the Scandinavian College of Chiropractic in accordance with the Declaration of Helsinki gave approval on the 12th September 2007 (ref: HRA/CSP2).

Study design

Prospective pilot observational diagnostic accuracy study

Primary study design


Secondary study design

Cohort study

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Mechanical non-traumatic chronic neck pain


A convenience sample of 30 participants will be invited to participate in the study. The participants will take part in ONE observation consisting of two tests: HRA and CSP. During the HRA test the participant will execute 60 movements and it is estimated to take 20 minutes. During the CSP test the participant will execute four different test series and it is estimated to take 10 minutes. There will be no follow-up observations.

Head Repositioning Accuracy (HRA):
Briefly, an ice hockey helmet with a connected laser pointer will be positioned on the head of each subject and adjusted for individual fit. A laser pointer is located at a 90° angle toward a mobile coordinate system. The position of the laser pointer is calibrated by the investigators so that the path of the laser pointer is at a right angle to the frontal plane, and at a distance of 100 cm to the approximate axis of motion from the co-ordinate system. The eyes will be occluded with a sleeping mask during the procedure. The participant will be asked to memorise the neutral position in order to duplicate it after an active, sub-maximal movement of the head. The mobile target will be calibrated after each repositioning movement so that the laser pointer is projected at the centre of the target. Following pre-recorded instructions, the subject will be instructed to move the head in a specific direction and then reposition the head to the neutral position. The investigators will register the location of the pointer when the position is stabilised (time standardised by pre-recorded instructions). The distance from the original position to the position at repositioning is measured. Each directional movement is repeated consecutively ten times and the average of the assessments is used as result in that direction. Head movements are done in right and left rotation, and extension and flexion. Four head movements are used. 10 movement-repositionings in right rotation, then 10 in left rotation, 10 in flexion then 10 in extension, for a total of 40 movement-repositioning tasks. The HRA procedure is performed on all participants by the same investigator.

Computerised Static Posturography (CSP):
This is used to assess balance in this study. A computerised, stable force platform (model FP4), developed for jump and balance testing, measured postural sway and changes in standing balance under altered visual conditions. The assessment of postural performance is performed in a calm, undisturbed room. The subjects will be standing barefooted on the force platform with the feet parallel to the y-axis of the platform and with the arms along their sides. The subjects’ feet are repositioned on the force platform for every test using a paper traced foot position based on the "comfortable position". Each subject is tested for static balance using a standing Romberg’s test first for 60 seconds with eyes open and then immediately followed by 60 seconds with occluded eyes. In the tests with eyes open, the subject focuses on a black dot, with the diameter of 5 centimetres, which is located on the wall approximately 3 metres away and adjusted to match the height of the subjects’ eyes. The participants are instructed to keep their arms along the body and keep as still as possible during the measurement. The total distance covered by the projection of the centre of the gravity during the each registration period is measured and reported. The force platform was calibrated according to manufacturer’s recommendations prior to each trial and performed on all participants by the same investigator. The calibration of the platform will be performed according to The Committee for Standardisation of Stabilometric Methods and Presentations.

Intervention type



Not Applicable

Drug names

Primary outcome measure

Participants with mechanical non-traumatic chronic neck pain will display disturbed cervicocephalic kinesthetic sensibility as measured with HRA and postural balance as measured with CSP, measured at one occasion in the beginning of November.

Secondary outcome measures

Psychometric Visual Analogue Scale (VAS) to verify if there is correlation between the pain level and the functional impairment, measured at one occasion in the beginning of November.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Aged 30 - 55 years
2. Male or female
3. Neck pain prolonged more than 12 weeks (not valid for participants in the control group who will be healthy individuals)

Participant type


Age group




Target number of participants

30 subjects

Participant exclusion criteria

1. Neck trauma
2. Chronic low back pain (greater than 3 months)
3. Arthrodesis in foot or ankle
4. Evident impaired function/pain in foot or ankle
5. Evident impaired function/pain in knee
6. Evident impaired function/pain in hip
7. Diastolic blood pressure greater than 110 mmHg
8. Pregnancy
9. Drug abuse
10. Aid for walking or standing
11. Known disease that affects nervous system (e.g. multiple sclerosis [MS], stroke, Parkinson's disease)
12. Known disease that affects vestibular apparatus (e.g. Meniere's disease, benign paroxysmal position vertigo [BPPV])

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Rasundavagen 101
Solna, Stockholm

Sponsor information


Scandinavian College of Chiropractic (Sweden)

Sponsor details

Rasundavagen 101

Sponsor type




Funder type


Funder name

Scandinavian College of Chiropractic (Sweden)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes