Question: In the situation where Wolverine has his head cut off (which I am sure would be no simple task, most likely requiring an adamantium weapon of some form) - 

What would happen? 

Would his head regrow a new body? Or would his body regrow a new head? This question specifically deals with what happens after the decapitation with Wolverine's regenerative abilities. Has this already been covered via comics?

Answer: 
His head and body both stay alive but they are useless until someone puts them together then he will start healing.

![enter image description here](https://i.stack.imgur.com/Uc7wO.jpg)
In the mainstream universe, decapitation would kill him. 

In the ultimate universe, his power is survival instead of healing, his skin would take in oxygen for his brain if he's just a head.