Abstract
The brachial plexus is a complex anatomical network of nerves that mainly supplies the upper limb. A thorough understanding of the anatomy of this region provides the clinician with valuable clinical information that is crucial for evaluating and planning treatment for patients with obstetrical brachial plexus palsy. We will highlight the anatomy of the brachial plexus and relevant clinical correlation between physical findings and the anatomical location of the level of the injury.