The study is a prospective, multicenter, interventional, open clinical trial, in Single Case Experimental Design (SCED) in multiple introduction withdrawal, controlled, randomized.
Have a loss of mobility in the upper limb (UL).
Have minimal functional capacities in the upper limb, defined by a score between 1 and 4 on the Lovett scale for all muscle groups of the arm, except for the hand and wrist.
Demonstrate effective distal motor skills in the upper limb to be fitted.
Be an informed patient who has provided signed consent, or in the case of minors, have given assent along with the signed consent of legal guardians.
Patients with cognitive or behavioral dysfunctions that may compromise adherence to instructions and procedures required for the trial (at the discretion of the investigator clinician).
Patients already enrolled in an interventional clinical trial.
History of fractures in the upper limb to be fitted within the six months preceding the inclusion visit in the trial.
Any conditions or injuries that may interfere with functional assessments.