Brachial Palsy is a condition that can happen during birth where the baby's arm can be partly and completely damage and paralyzed.
This happens when there is an injury during the delivery of the shoulders and head, when the brachial plexus is stretched the baby may have problems, weakness and paralysis in the arms.
When the baby is born with their palms down and their elbows are not bend, they may be suffering from Brachial Palsy. Usually, the upper part of the baby's arm is affected and they can still move their hands and fingers, but most likely the entire arms is damaged.