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CompletedNCT00288847Updated Sep 22, 2015

Functional Surface Electromyogram of Knee Extensors in Healthy Humans and Patients With Patella-dislocation.

An observational study in Patella-Dislocation, sponsored by University Hospital, Basel, Switzerland. Completed at 1 site in Switzerland. Open to participants aged 18 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-09-22.

Sponsored by University Hospital, Basel, Switzerland · Observational

Study type
Observational
Time perspective
Retrospective
Enrollment
15
Ages
18 Years to 80 Years
Sex
All
01

Study summary

The activation of the knee extensors in adults after patella dislocation.

The kneecap can dislocate due to an accident or also only due to an interior turn in the stretched knee joint out of its sliding bearing. E. Arendt (Arendt 2002) wrote an overview work, in which possible causes and working methods to the patella dislocation are discussed. Despite almost one hundred quotations the authors are not able find the causes and the possible treatment concepts. The study will examined healthy adults (25 female and 25 men) and 25 patients with patella dislocation by a routine applied clinical gait analysis and surface EMG (after the European SENIAM guidelines) iin the Laboratory for Gait Analysis Basel of the Children's University Hospital Basel. The combination of gait analysis and the surface EMG with Wavelet analysis may objectify possible reasons for a patella dislocation

Read the detailed description

Introduction The kneecap can dislocate due to an accident or also only due to an interior turn in the stretched knee joint out of its sliding bearing. E. Arendt (Arendt 2002) wrote an overview work, in which possible causes and working methods to the patella dislocation are discussed. Despite almost one hundred quotations the authors are not able find the causes and the possible treatment concepts. The study will examined healthy adults (25 female and 25 men) and 25 patients with patella dislocation by a routine applied clinical gait analysis and surface EMG (after the European SENIAM guidelines) in the Laboratory for Gait Analysis Basel of the Children's University Hospital Basel. The combination of gait analysis and the surface EMG with Wavelet analysis may objectify possible reasons for a patella dislocation and compare the intensity pattern of the EMG between the groups.

Method All subjects (healthy and patients with a patella dislocation) will be prior to the study informed about the study and sign the consent from

The investigation will include the following tasks:

  • Preparation of the subject for a clinical gait analysis with placing reflecting marker on the lower body according to the maker setup of Davis et al. (Davis III et al., 1991.
  • Preparation of the subject for a surface EMG of the muscles: gastrocnemius medialis, tibialis anterior, vastus medialis, vastus lateralis, rectus femoris, biceps femoris, semitendinosus according to the SENIAM-Standard.
  • Measurements: 10 trials of level walking in self selected speed and 3 times 5 single leg quads on the force plate.
  • System: VICON 460 (6 Cameras, 120 Hz, Oxford Metrics Ltd., UK).
  • EMG-System: Zebris, Tuebingen, Germany; Amplifiers: Biovision, Wehrheim, Germany, EMG-Electrodes: Bipolar Ag/AgCl Surface Electrodes Noraxon, Sampling rate: 2520 Hz
  • Data analysis: Kinetic-and kinematic data with the Vicon-Software, EMG-Data with Wavelet Package (Biomechanigg, Calgary, Canada)
  • Statistical Analysis: ANVOA
02

Conditions studied

  • Patella-Dislocation

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Keywords

  • Patella Dislocation
  • Surface EMG
  • Gender difference
03

In context

Patellar Dislocation

41 studies on the registry are indexed under Patellar Dislocation; 9 are open to participants now.

This study's enrollment of 15 is below the median of 100 across 15 observational studies indexed under Patellar Dislocation.

Browse Patellar Dislocation studies →

Lead sponsor

University Hospital, Basel, Switzerland is the lead sponsor of 990 studies on the registry; 189 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patient: Patella Dislocation before surgery
  • Control: healthy

Exclusion criteria

Exclusion Criteria:

  • Patient: Patella Dislocation not able to walk,
  • Patient: using orthosis or crutches
  • Control: knee injury (e.g. ACL-rupture)
  • Control: leg surgery in the last 5 years
  • Control: sport injury in the last 6 month (e.g. Muscle pulling)
05

Study design

Time perspective
Retrospective
Enrollment
15 participants (actual)
06

Study locations

1 site
  • Lab. for Orthopaedic Biomechanics, University of Basel
    Basel, BS 4056, Switzerland
07

References and documents

Publications

  • Von Tscharner V, Goepfert B. Estimation of the interplay between groups of fast and slow muscle fibers of the tibialis anterior and gastrocnemius muscle while running. J Electromyogr Kinesiol. 2006 Apr;16(2):188-97. doi: 10.1016/j.jelekin.2005.07.004. Epub 2005 Sep 1. PubMed 16139523 ↗
  • von Tscharner V, Goepfert B. Gender dependent EMGs of runners resolved by time/frequency and principal pattern analysis. J Electromyogr Kinesiol. 2003 Jun;13(3):253-72. doi: 10.1016/s1050-6411(02)00111-6. PubMed 12706605 ↗
  • von Tscharner V, Goepfert B, Nigg BM. Changes in EMG signals for the muscle tibialis anterior while running barefoot or with shoes resolved by non-linearly scaled wavelets. J Biomech. 2003 Aug;36(8):1169-76. doi: 10.1016/s0021-9290(03)00086-1. PubMed 12831743 ↗
  • von Tscharner V, Gopfert B, Wirz D, Friederich NF. [Analysis of wavelet transformed electromyographic signals that were altered by wearing a knee brace]. Biomed Tech (Berl). 2004 Mar;49(3):43-8. doi: 10.1515/BMT.2004.009. German. PubMed 15106897 ↗
  • von Tscharner V. Time-frequency and principal-component methods for the analysis of EMGs recorded during a mildly fatiguing exercise on a cycle ergometer. J Electromyogr Kinesiol. 2002 Dec;12(6):479-92. doi: 10.1016/s1050-6411(02)00005-6. PubMed 12435545 ↗
  • von Tscharner V. Intensity analysis in time-frequency space of surface myoelectric signals by wavelets of specified resolution. J Electromyogr Kinesiol. 2000 Dec;10(6):433-45. doi: 10.1016/s1050-6411(00)00030-4. PubMed 11102846 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 22, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00288847
Collaborators
Lab. for Orthopaedic Biomechanics, University of Basel, University Children's Hospital Basel
Responsible party
Sponsor
First posted
Feb 8, 2006
Start date
Nov 2005
Primary completion
Dec 2007
Completion
Dec 2007
Last update
Sep 22, 2015

Study contacts

Beat Goepfert, MEng
principal investigator · Lab. for Orthopaedic Biomechanics, University of Basel
Dieter Wirz, MD
principal investigator · Lab. for Orthopaedic Biomechanics, University of Basel
Alma U Daniels, Ph.D.
study chair · Lab. for Orthopaedic Biomechanics, University of Basel

Oversight

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

Not currently enrolling

This study is completed, as verified in Sep 2015. You cannot join it, but the record below documents what was studied.

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