Tonight in S06E14 of The Walking Dead, we see a character receive fatal brain trauma (not exactly an uncommon occurrence on this show). Specifically:
Denise, the makeshift physician for Alexandria, is giving a monologue when another character fires a crossbow bolt through the back of her head and out her eye socket.
Clearly this is a fatal injury, and the character dies. However, after receiving the injury, this character continues talking in fragmented speech for a few words before falling to the ground.
While I have been able to find a wealth of knowledge about how to treat brain trauma such as nonfatal gunshot wounds or concussions, apparently there is a dearth of information available as to whether it is realistic to continue performing an action requiring fine motor control (such as speaking) in the seconds between receiving a fatal brain injury and the onset of brain death.
Is this scene in S06E14 of The Walking Dead realistic?