WRIST DROP. The radial nerve supplies the extensor muscles at the posterior compartment of the forearm. Wrist drop is a pathological condition whereby there is damage to the radial nerve and the muscles at the posterior compartment of the forearm becomes weak making the wrist dropped or remains in a fixes flexion postion. It is also known as radial nerve palsy, Saturday night palsy, honeymoon palsy, crutch paralysis or musculospiral nerve palsy. Direct trauma to the radial portion of the wrist, can damage the nerve to cause wrist drop. Also, prolong and improper use of crutches can compresse the nerve in the axilla(armpit) to cause the condition. Get best physiotherapy treatment Dr ayaz physiotherapy clinic nallasopara vasai virar