Functional Surface Electromyogram of Knee Extensors in Healthy Humans and Patients With Patella-Dislocation. - Full Text View

Sponsors and Collaborators:	University Hospital, Basel, Switzerland Lab. for Orthopaedic Biomechanics, University of Basel University Children's Hospital Basel
Information provided by:	University Hospital, Basel, Switzerland
ClinicalTrials.gov Identifier:	NCT00288847

Purpose

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

Condition
Patella-Dislocation

MedlinePlus related topics: Dislocations

U.S. FDA Resources

Study Type:	Observational
Study Design:	Screening, Cross-Sectional, Defined Population, Retrospective Study
Official Title:	Functional Surface Electromyogram of Knee Extensors in Healthy Humans and Patients With Patella-Dislocation.

Further study details as provided by University Hospital, Basel, Switzerland:

Estimated Enrollment:	75
Study Start Date:	November 2005
Estimated Study Completion Date:	June 2006

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

Eligibility

Ages Eligible for Study:	18 Years to 80 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	Yes

Criteria

Inclusion Criteria:

Patient: Patella Dislocation before surgery
Control: healthy

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)

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00288847

Locations

Switzerland, BS
Lab. for Orthopaedic Biomechanics, University of Basel
Basel, BS, Switzerland, 4056

Sponsors and Collaborators

University Hospital, Basel, Switzerland

Lab. for Orthopaedic Biomechanics, University of Basel

University Children's Hospital Basel

Investigators

Principal Investigator:	Beat Goepfert, MEng	Lab. for Orthopaedic Biomechanics, University of Basel
Principal Investigator:	Dieter Wirz, MD	Lab. for Orthopaedic Biomechanics, University of Basel
Study Chair:	Alma U Daniels, Ph.D.	Lab. for Orthopaedic Biomechanics, University of Basel

More Information

Homepage of the Lab. for Orthopaedic Biomechanics, University of Basel This link exits the ClinicalTrials.gov site

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. Epub 2005 Sep 1.

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.

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.

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. German.

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.

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.

Study ID Numbers:	LOB_00001_patella
Study First Received:	February 2, 2006
Last Updated:	September 8, 2006
ClinicalTrials.gov Identifier:	NCT00288847
Health Authority:	Switzerland: Ethikkommission

Keywords provided by University Hospital, Basel, Switzerland:

Patella Dislocation
Surface EMG
Gender difference

Study placed in the following topic categories:

Patellar Dislocation
Dislocations
Wounds and Injuries
Knee Injuries

Disorders of Environmental Origin
Leg Injuries
Healthy

ClinicalTrials.gov processed this record on February 10, 2009