Nope. There aren’t any bones inside the abdominal cavity.
Methinks the poster should become more familiar with what Pink Floyd meant in their lyrics. 
The important part is the corpus callosotomy - disconnecting the epileptic hemisphere from the good side. Other disconnections also occur. Of course, this is not an exact science, but the human brain can make incredible recoveries from this sort of surgery (but it may not). It is probably the case that the better hemisphere has already taken function from the damaged side, so it quite different from trying to remove half a normally funtioning brain from an adult (which would be hugely damaging if not fatal). Also, this procedure is usually carried out on children, whose brains appear to have more capacity to recover and re-form neural pathways. Blood supplies are left intact, to prevent necrosis. The excised hemisphere is there, but walled off from the rest of the brain and nervous system.
This is a risky procedure, and results are not always good, but it can result in a remarkable improvement.
Si (by no means an expert)