Have anyone ever experienced these sensations while extremely sleep-deprived (or with drugs)?

I had a slightly difficult time understanding 2, but I think I get you on 1. And I think I’ve experienced similar when extremely ill.

I don’t know if it’s the medication I needed to take when ill or if it was just the severity of my sickness itself but I was very mentally affected during my worst bouts of illness. I recall needing to concentrate very hard just to hold a normal conversation.

In particular, I remember this one event. I was doing some math with a friend and I had punched some numbers into a calculator and he wanted me to read back the result to him. I was shocked by how difficult this was. I don’t know if I was having a hard time connecting the numeral to the word it represented, or what. I remember getting very anxious that he would think I had lost it.

When I read your first example I was struck by how it sounded like something I read in “Drawing on the Right Side of the Brain”.

As I recall, what sometimes prevents us from drawing well is the rational way of thinking, that is, the mindset that we use in our daily lives. The example given was about attempting to draw a chair and the brain saying that because it knows what a chair is and what it looks like we have a mental blueprint so we don’t need to observe it and draw what what we are actually seeing we can just draw from our prior knowledge. It was a long time ago but there was something about by not drawing the actual object (or person) but drawing the negative spaces around it or contained by it we trick the left side of our brain because it cannot name what it is we are drawing so it gives up and allows the more creative right side to attempt the task.

Perhaps the meds or lack of sleep is causing this reality shift. Perhaps the left side gives up the mundane task of day to day existence it usually does because it can no longer understand and so allows the right side takes on duties that it is unfamiliar with. What you are seeing is not wrong just interpreted, or presented, differently.

Evidently the left side is more rational. Some of its characteristics are:

Responds to verbal instructions
Problem solves by logically and sequentially looking at the parts of things
Looks at differences
Is planned and structured
Prefers established, certain information
Prefers talking and writing
Prefers multiple choice tests
Controls feelings
Prefers ranked authority structures
Is a splitter: distinction important
Is logical, sees cause and effect

While the Right side is intuitive. It:

Responds to demonstrated instructions
Problem solves with hunches, looking for patterns and configurations
Looks at similarities
Is fluid and spontaneous
Prefers elusive, uncertain information
Prefers drawing and manipulating objects
Prefers open ended questions
Free with feelings
Prefers collegial authority structures
Is a lumper: connectedness important
Is analogic, sees correspondences, resemblances

Sleep deprivation has the following effect on me when I am in my human form.
– unable to concentrate
– every little noise becomes extremely irritating and infuriating to the point that one wants to brutally murder the source of the noise.
– losing the will to live, a.k.a. being so tired that death seems like a nice thing

I have, as it’s pretty much a constant part of my daily life, moreso in recent months. I would rather not discuss it much beyond that in public though.

I can’t relate to your second point, but the first one describes what I’m feeling quite often. There are days when I feel like I don’t wake up at all. Everything is a daze, I can’t get my mind to engage, and I look for distractions constantly. I feel numb, but not calm by any definition. My brain is constantly tapping out rhythms, which my fingers, teeth, or leg tap along with. When I’m out at these times, I don’t notice any detail at all. I see things, but they don’t register much. It does not get as bad as what you’re describing, I think, but I do have to shake myself and actively concentrate so I can function and, for example, cross a road.

No drugs or sleep-deprivation needed, though this does get worse if I haven’t slept much. It also gets worse if I spend too much time in front of screens – and then again, most days, I am fine.

You could get some interesting explanations from Tom Kenyon or shamanic dreaming experts. We dream of the dream world, and those in the dream world dream what we call our physical world, or something like that. When you’re partly asleep and partly conscious, you’re in the betwixt and between. Your tired body and brain’s capacity to track the real world fade out and blur with your subconscious and with dream spirits and so on, and you can hallucinate perceive distorted senses and non-physical things. Your consciousness has a difficult time connecting with your body.

I feel like I’ve had similar things to both of them after not sleeping for like a day and a half, the first one especially, but the second one, and I may be just misunderstanding, seems sort of like normal waxing-philisophical thought.