Obstetric Brachial Palsy (OBP) produces functional limitations in the involvement of the affected upper limb within the child's natural environment. The therapeutic interventions of Conventional Mirror Therapy (MT) and Mirror Therapy Virtual Reality (VR) are aimed at the rehabilitation of the affected upper limb and the quality life improvement.

To quantify the increase in the affected upper limb spontaneous use and the quality of life of children with upper OBP from 6-12 years, when They are treated with Conventional MT or Mirror Therapy VR applying specific protocol: 20 min/day in 4 weeks.

The intervention protocol was permorfed for four weeks, three days per week applying Conventional Mirror Therapy or Mirror Therapy Virtual Reality, with 20-minute sessions in 4 weeks. Designed to be done at home.

Two measurements of the affected upper limb spontaneous use and quality of life were performed, a pre-treatment assessment corresponding to the baseline situation, and another post-treatment Assessment to observe the results after the therapy.

Inclusion Criteria:

• Ages between 6 and 12 years old, upper Obstetric Brachial Palsy type Erb-Duchenne (C5-C6) and extended Erb-Duchenne (C5-C7), preserved functionality to do the activities, adequate cognitive level to follow the proposed activities.

Exclusion Criteria:

• associated pathologies, medical complications or cognitive and / or visual impairment that prevent the activities performance, affected upper limb surgeries in the last year, treatment with botulinum toxin in the last three months, no possession of a device with Android operating system for the application of Virtual Reality therapy, families and children no partners.