severe difficulty in remembering or even understanding what is going on around and to you. Be glad you don't remember any of that stuff. No doubt it would have been terrifying if you'd been awake and understanding it all.

I'm guessing that you were near death but hadn't crossed over to technical death where your brain experienced oxygen deprivation because you were on full life support to prevent that. That may be why you never experienced any weird stuff like bright lights, dark tunnels, or other often described phenomenon.

Those things usually reported in near death, oxygen deprivation situations can be attributed to the brain deprived of oxygen OR, for believers, visions of heading to heaven. No one really knows because no one has ever survived actual, no turn-around death, only technical death and resuscitation. Be glad you didn't go there. It can't be a good thing for your brain to be deprived of oxygen, even if no obvious damage can be found.