to the injury as well as facilitates nerves in functioning properly. A study has also shown that a sensory-motor deficit in the upper limbs after a brachial plexus injury can affect the corporal balance in the vertical positioning. Examined patients had a lower score in the Berg balance scale, a greater difficulty in maintaining in the unipodal stance during one minute and leaned the body weight distribution to the side affected by the lesion. Patients also exhibited a greater variability in the postural oscillation, evaluated by the directional stability index. The results alert the clinical community about the necessity to prevent and treat secondary effects of this condition. Epidemiology Brachial plexus injury is found in both children and adults, but there is a difference between children and adults with BPI. Adults The prevalence of brachial plexus injuries in North American adults in the 1900s was about 1.2%. BPI is most commonly found in young healthy adults, from ages 14 to 63 years old, with 50% of patients between 19 and 34 years old. 89% of BPI patients are male. The rate of brachial plexus injury has been increasing. Children OBPP, also known as obstetrical brachial plexus palsy, occurs primarily in young children at a rate of 0.38 to 1.56 per 1000 live births depending on the type of care and the average birth weight of infants in different regions of the world. For example, a study in the United States showed and incidence of OBPP of about 1.51 cases per 1000 live births, in a Canadian study, the incidence was between 0.5 and 3 injuries per 1000 live births, a Dutch study reported an incidence of 4.6 per 1000 live births. The risk of BPI at birth is highest for infants weighing more than 4.5 kg at birth born to diabetic women. Type of delivery also affects the risk of BPI. Brachial plexus injury risks for newborns are increased with gained birth weight, birth delivery where a vacuum is assisted, and not being able to handle glucose. Traumatic injuries BPI has shown to occur in 44% to 70% of traumatic injuries, such as motorcycle accidents, sporting activities, or workplace accidents. With 22% being motorcycle injuries and about 4.2% having plexus damage. People who have accidents with riding motorcycles and snowmobiles have higher risks of getting a BPI and with ihg-injury injuries such as motorcycle accidents, root avulsion from the spinal