The primary objective of the AbleLite early feasibility study is to evaluate the function of the upper limbs of participants diagnosed with neuromuscular disorders as children, with and without use of the Abilitech AbleLite device in the clinic and home environments. Functional outcomes will include documenting active range of motion and the ability to perform activities of daily living (ADLs) using the standardized Canadian Occupational Performance Measure (COPM) and the Role Evaluation of Activities of Life (REAL) assessments. Secondary objectives are to assess the safety record and report on adverse events (AEs) and parameters related to device usage, including device usage time and the time required to don/doff the device.

Inclusion Criteria:

1. Subjects between 9 and 18 years of age, with pediatric onset of neuromuscular conditions that cause quadriparesis
2. MMT score of 1-3 in the elbow, wrist and hands, and an MMT score of 2- to 3 in the shoulder
3. Ability of subject to raise their forearm off of their lap or laptray
4. Willingness to comply and participate with the study protocol and attend the study sessions
5. Ability to communicate verbally and respond to questions and commands
6. Ability to provide informed consent
7. Selected for participation based on investigator discretion

Exclusion Criteria:

1. Use of ventilator
2. Open wounds or chronic pressure sores on upper extremities, neck, back or torso
3. Significantly unstable upper extremity joints
4. Unhealed bone fractures in the upper extremities
5. Active rotator cuff tear, grade 2 or 3
6. Surgical fixations limiting full passive range of motion
7. Uncontrolled upper-limb spasticity that significantly limits normal range of motion
8. Uncontrollable pain in the neck, shoulders or upper limbs
9. Ability to fully raise both hands simultaneously above their head with ease
10. Lack passive shoulder abduction of 120 degrees
11. Lack 90 degrees of passive elbow extension
12. Unable to follow instructions
13. Exhibit significant behavioral problems
14. Inability to provide consent