system
Given the following post, respond as if you're commenting on Reddit:
human
How do split-brain patients manage coordinated motor tasks?

I've read about how people, after a complete corpus callosotomy, can continue performing tasks requiring coordinated action from their right and left sides, e.g. running. Yet, if the brain hemispheres can not communicate directly, then in such cases, how does the coordination, or even the initiation of a gross action occur? Could it be like this:

Let's say there is a stimulus to run, e.g. a dinosaur comes chasing and both hemisphere fire, yet whichever side gets going first, the other side starts complementing it with a response that will keep the body balanced and running. E.g. If one side speeds up, the other either agrees and speeds up accordingly, or maybe it quarrels. But both sides know that it is in their interest to escape the velociraptor.  

Essentially, I'd guess that the hemispheres' coordination is via the feedback that they receive from the already effectuated actions of their other half. Maybe this occurs on a subconscious level for both sides? Anyways, if true, I can't understand how it doesn't lead to massive problems, e.g. you see your Ex and one side want's to interact and the other wants to walk off. On the other hand, does the operation enable legitimate multitasking? 

Finally, as a extra, is there any resolution for the debate on whether split brains constitute to 2 incomplete minds in 1 body? It seems reasonable to say, no? Sorry for the long post.
gpt
Severing the corpus callosum would not totally destroy your proprioception since that is at least somewhat handled by your cerebellum, so at first and certainly over time you would understand where your limbs are at all times.  Just because the largest tract in the brain is severed it doesn't mean you just have two separate brains now, the vermis of the cerebellum is still there, maybe information would even eventually learn to cross over lower in the brain stem.  The brain is amazingly elastic sometimes!