• INCLUSION CRITERIA:

Individuals with neuromuscular disorders and Healthy Volunteers in order to be eligible to participate in this study, must meet all of the following criteria:

• Children; One month old to 17 years of age

  --In the case of infants and very young children, they need to be able to imitate or perform an action on cue (e.g., reach out for a toy that is presented or take steps if placed on a treadmill) based on the parent report if the subject is a child and physician observation during history and physical examination.

• Adults; 18 years 99 years

• In good general health as evidenced by medical history or diagnosed with impairment of neuromusculoskeletal system

• Stated willingness to comply with all study procedures and availability for the duration of the study

• Provision of signed and dated informed consent form

• For those participants older than 5 years of age who have an abnormal gait pattern when walking as a result of a central nervous system injury, Dr. Alter will ask them or their guardian about their seizure history

EXCLUSION CRITERIA:

Individuals with neuromuscular disorders and Healthy Volunteers, who meets any of the following criteria will be excluded from participation in this study:

• Individuals with pacemakers
• Pregnancy
• Adults unable to provide informed consent