Understanding the underlying pathology of nerve injuries of the upper limb can be confusing. This video is great for you if you want to learn about the injuries to the median and ulnar nerves. Clinical presentations like ape hand, claw hand and sign of benediction are described with their underlying causes. 0:00 introduction 0:40 overview of muscles involved 4:26 nerves and their motor supply 5:17 claw hand 6:55 ape hand 7:15 sign of benediction