Snapshot A 12-year-old boy is brought to the emergency department by his mom because he has noticed that he is no longer able to fully extend the fingers of his right hand. Three weeks prior to presentation, he had suffered a right fibula fracture while riding his bike and was given a pair of crutches to use while his leg recovered. He says that he lost that set of crutches and therefore has been using his taller friend's crutches. Upon further questioning he reveals that the new crutches have been putting a lot of pressure on his axilla. On physical exam he is found to have a wrist drop and decreased sensation over his posterior forearm and dorsal hand. (Radial nerve palsy, also known as Saturday night palsy) Overview Axillary Nerve (C5 and C6) Cause of injury login to view 2 more bullets Motor deficit login to view 1 more bullet Sensory deficit login to view 1 more bullet Sign login to view 1 more bullet Radial Nerve (C5-T1) Overview login to view 6 more bullets Cause of injury login to view 3 more bullets Motor deficit login to view 4 more bullets Sensory deficit login to view 3 more bullets Sign login to view 1 more bullet Median Nerve (C6-C8 and T1) Cause of injury login to view 5 more bullets Motor deficit login to view 6 more bullets Sensory deficit login to view 6 more bullets Sign login to view 7 more bullets Ulnar Nerve (C8 and T1) Cause of injury login to view 4 more bullets Motor deficit login to view 7 more bullets Sensory deficit login to view 2 more bullets Sign login to view 6 more bullets Musculocutaneous Nerve (C5-C7) Cause of injury login to view 1 more bullet Motor deficit login to view 1 more bullet Sensory deficit login to view 1 more bullet