Welcome back for episode 4! This one is going to cover some common Brachial plexus injuries that you are likely to encounter on Step. Here is a link to the episode.
This is a representation of the hand trick that I talk about in the episode:
Here is a diagram of the brachial plexus for reference.
This is a diagram of the claw hand (Klumpke's) and what kind of injuries can create this pattern.
Here is a diagram that shows Erb's Palsy.