Vibration Intervention to Improve Bone and Muscle in Children With Cerebral Palsy

Study Overview
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Brief Summary
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Cerebral palsy is a group of disorders characterized by lack of coordination in the muscles, loss of movement, and speech disturbances. These disorders are caused by injuries to the brain that occur during fetal development or near the time of birth. The purpose of this study is to determine the effects of high frequency, low magnitude vibration on bone and muscle in children with cerebral palsy.

Detailed Description
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The extent of bone mass built up during childhood and adolescence is the most important determinant of osteoporosis later in life. Some disabled children, such as those with cerebral palsy, are particularly vulnerable to low bone mass accumulation due to decreased mobility and weight-bearing. These children also have poor muscle strength and control, which limits function and contributes to the lack of mechanical stimulation needed to build bone mass. The most common treatment for these children is physical therapy, which is time- and labor-intensive and may not be adequately available to them. Whole body vibration has shown promise as an alternative method for stimulating increases in bone mass and improvements in muscle. The purpose of this study is to evaluate the effects of high frequency, low magnitude vibration on bone and muscle in children with cerebral palsy. This intervention may be useful as a noninvasive, nonpharmacological treatment for low bone mass and poor muscle function in these children. This study will last 1 year. All participants will visit the hospital 3 times, at study entry and Months 6 and 12. At each visit, height and weight will be measured, muscle strength and balance will be tested, and bones and muscles in the spine and lower leg will be imaged with computed tomography (CT), a special x-ray machine. Participants will be randomly assigned to one of two groups. For this study, all participants will be asked to stand for 10 minutes every day for 1 year. For Group 1, a vibrating platform will be used for the 10-minute standing sessions during the first half of the study but not during the second half of the study. For Group 2, this will be reversed and the vibrating platform will not be used during the first half of the study but will be used during the second half of the study.

Official Title
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Mechanical Intervention in Children With Cerebral Palsy

Conditions
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Cerebral Palsy

Intervention / Treatment
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* Device: High frequency, low magnitude vibration
* Other: Standing


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Diagnosis of cerebral palsy Low vertebral bone density Able to stand for 10 minutes with handheld support Parent or guardian willing to provide informed consent Exclusion Criteria: Surgery, casting, or receipt of botulinum toxin in the 12 months prior to study entry Planned surgery, casting, or receipt of botulinum toxin in the 12 months after study entry Metal rods or plates in tibia or lumbar spine Severe scoliosis (greater than 20 degrees) or bowing of tibia Medical condition other than cerebral palsy affecting bone or muscle Require corticosteroids or seizure medication (phenytoin)

Ages Eligible for Study
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Minimum Age: 6 Years
Maximum Age: 12 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Vibration<br>High frequency, low magnitude vibration at 30 Hz, 10 min/day using vibrating platform from Juvent Medical Inc. | Device: High frequency, low magnitude vibration<br>* High frequency, low magnitude vibration at 30 Hz, 10 min/day using vibrating platform from Juvent Medical Inc.<br>|
| Active Comparator: Standing<br>Standing 10 min/day | Other: Standing<br>* Standing 10 min/day<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Vertebral bone density |  | Measured at Month 12 | 
| Tibia bone density |  | Measured at Month 12 | 
| Tibia cross-sectional area |  | Measured at Month 12 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Calf muscle strength |  | Measured at Month 12 | 
| Balance test | Clinical balance test used by California Children's Services, Los Angeles County Medical Therapy Units | Measured at Month 12 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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vibration, bone density