The purpose of this study is to investigate the relation between scapular movement, muscle activation and cranial translation in healthy volunteers.
ID
Source
Brief title
Condition
- Joint disorders
Synonym
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
Scapulothoracic movement (posterior tilt = scapular rotation in the sagital
plane)
Secondary outcome
Three dimensional electromagnetic motion analysis (see paragraph 6.1.3)
Scapulothoracic motion (i.e. protraction, lateral rotation and tilt) at various
abduction angles.
Gropho (see paragraph 6.1.4)
* Acromio-humeral (AH) distance on standard AP radiograph at rest: AHrest.
* Acromio-humeral (AH) distance on AP radiograph in isometric abduction: AHabd.
* Dynamic cranial translation is measured by: AHrest - AHabd = dAH .
* Scapular spine-humeral-head center (SHC) at rest, SHCrest.
* SHC during an isometric abduction task, SHCabd.
* SHC at rest, SHCrest.
* dynamic SHC, dSHC = SHCrest - SHCabd.
* absolute EMG activity and activation ratios.
For further explanation, see sections 6.1.4 and 6.1.6.
External force controlled electromyography (see paragraph 6.1.5)
* absolute EMG activity and activation ratios.
For further explanation on EMG activity calculations, see sections 6.1.5 and
6.1.6.
Clinical evaluation (see paragraph 6.1.7)
* Visual Analogue Scale(VAS) for pain.
* Constant score.
* SF-36.
Background summary
Scapular movements, glenohumoral instability (i.e. cranial humeral translation)
and pathologic muscle activity are all potential causal factors of subacromial
impingement syndrome/SIS. Alterations in scapular movement could lead to
narrowing of the subacromial space. Similarly glenohumeral translation could
lead to a cranial position of the humerus. A narrowed subacromial space
impinges subacromial structures like the rotator cuff causing pain. To
compensate for pathologic rotator cuff activitiy we proved (in patients with
rotator cuff tears) increased muscle activity of the deltoid muscle. This
overactive muscle was correlated with coactivation of shoulder abductors. We
expect these mechanisms are also found in patients with SIS. To prove this
theory and to classify patients with impingement syndrome we started the
SISTIM-SuSy trial (ABR nr 28090). The SISTIM trial offers us a biomechanical
analysis in a highly selected group of patients. This study aims to study and
describe biomechanics (scapular movement, muscle activity and cranial
translation) in healthy volunteers. Subsequently this healthy group will serve
as a control group for the patients in the SISTIM study and other shoulder
pathology.
Study objective
The purpose of this study is to investigate the relation between scapular
movement, muscle activation and cranial translation in healthy volunteers.
Study design
Observational cohort study
Study burden and risks
Most importantly healthy volunteers visit the LUMC for about 2.5 hours once.
Additional questionnaires are completed by the participants. Thee different
experiments are completed. Three X-rays of shoulder are made in every patients
which will result in some radiation exposure. The radiation of three X-ray's is
limited (compareble with a flight from Amsterdam to the United States) and
risks are neglectable.
Albinusdreef 2
Leiden 2300RC
NL
Albinusdreef 2
Leiden 2300RC
NL
Listed location countries
Age
Inclusion criteria
No current or past shoulder complaint (bilateral);Further definition: Visual Analogue Scale for shoulder-pain of < 10mm (0-100mm, in which 0 indicate no pain) and no complaints of an impaired shoulder function.
Exclusion criteria
History of shoulder complaints (e.g. pain, instability, dysfunction)
Definition: patients who received medical attention for a shoulder complaint or experienced shoulder complaints (impaired function or experienced pain) > 1 week.
No full range of motion during physical examination
History of malignancy
History of traumatic shoulder injury
History of fracture of the shoulder
History of osteoarthritis or rheumatoid arthritis
Frozen shoulder
Previous shoulder injections or shoulder surgery
History of neurologic disease or muscle disease
Diabetes mellitus
No informed consent
Insufficient Dutch language skills
Pacemaker or other electronic devices.
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 | NL50546.058.15 |