A brachial plexus injury is an injury to the brachial plexus — the network of nerves that sends signals from your spine to your shoulder, arm and hand. An injury occurs when these nerves are stretched or, in the most serious cases, torn. (ref: Mayo Clinic)
The child's shoulder became lodged on the mother's pubic bone during birth resulting in the injury.
Designed for a lay audience in mind. It was necessary to maintain a neutral perspective with the look and feel of the illustrations. The underlying anatomy was kept as simple as possible as well as the flat shading on the call out, as to not sway a jury any which way.