&Radial Nerve Palsy=The most common type of radial nerve injury is spiral groove syndrome, in which the radial nerve is compressed against the humerus. The most prominent feature is wrist drop with flexion of the MCP joints and adduction of the thumb. Anesthesia in the web space and hypesthesia from the dorsal aspect of the forearm to the thumb, index and middle fingers maybe present. If the radial nerve is compressed more proximally through improper use of crutches or leaning of the arm over the back of the chair (Saturday night Palsy),  weakness of the brachioradialis and triceps may also occur.