Have you ever found your emotions spiraling out of control as you pour yourself another glass of wine at 2.30 am, while the only light in the room is the one emanating from your laptop screen? Well, there is likely a biological basis for that, according to neurology professor Elizabeth Kerman. She has spent years investigating how “fragmented” or “insufficient” sleep affects how we function the day afterward. She has since turned her attention to the “changes in cognition and behavior” that happen while we’re up at night – with potentially deadly consequences for our physical health, our menta…