Use of EMG to Assess Clinical Hypertonia

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00472914
Recruitment Status : Completed
First Posted : May 14, 2007
Last Update Posted : May 23, 2014
Information provided by (Responsible Party):
Terence Sanger, University of Southern California

Brief Summary:
A handheld surface electromyography device will be tested by clinicians on children with limb hypertonia, and inter-rater reliability will be assessed with and without the device.

Condition or disease Intervention/treatment
Cerebral Palsy Hypertonia Spasticity Dystonia Rigidity Device: portable surface electromyography

Detailed Description:


Qualitative surface EMG measurement during passive movement will increase the inter-rater reliability of clinicians for diagnosis of spasticity and dystonia in children with hypertonia.

Specific Aims:

  1. Develop a handheld surface EMG device with auditory output that can be used similarly to a stethoscope to listen non-invasively to the activity of muscles.
  2. Provide clinicians at 5 different institutions with a device to test for 2 months in their own clinics.
  3. Bring all 5 clinicians to Stanford University for a single-day exercise in which each clinician will examine 10 children with hypertonia. Each clinician will rate the children without using the device, and then again with the device. Intra-class correlations and kappa statistics will be used to assess whether the use of the device leads to improved inter-rater reliability.

Study Type : Observational
Enrollment : 14 participants
Time Perspective: Prospective
Official Title: Initial Assessment of the Use of Surface Electromyography as a Tool for Clinical Evaluation of Hypertonia in Children
Study Start Date : January 2007
Actual Study Completion Date : March 2007

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Ages Eligible for Study:   6 Years to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age 6-18
  • hypertonia in at least one limb due to spasticity

Exclusion Criteria:

  • any condition that would increase the risk of participation

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00472914

United States, California
Stanford University
Stanford, California, United States, 94305
Sponsors and Collaborators
University of Southern California
Principal Investigator: Terence D Sanger, Md, PhD Stanford University

Responsible Party: Terence Sanger, Associate Professor, University of Southern California Identifier: NCT00472914     History of Changes
Other Study ID Numbers: EMG auditory
First Posted: May 14, 2007    Key Record Dates
Last Update Posted: May 23, 2014
Last Verified: May 2014

Keywords provided by Terence Sanger, University of Southern California:

Additional relevant MeSH terms:
Muscle Hypertonia
Cerebral Palsy
Brain Damage, Chronic
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Neuromuscular Manifestations