Mind of my Stroked Brain

Some days, I feel very sleepy. Not the garden variety, it's the variety of "Tom" of "Tom and Jerry" fame struggling to keep his eyelids open and doesn't succeed even by propping them with matchsticks. It has no apparent reason - I won't be tired/ fatigued, I won't be unwell, I would have slept well prev night, no new routine, no change in diet, no nothing... I may be force-correlating, but I have noticed that soon after (next day types), either I have gained some new ability or lost something. Not any big things, very small, almost unnoticeable stuff. I think it is the brain doing some heavy lifting and wants to shut down everything else. To "hibernate" or run everything else in "power saving mode" I remember when I would get such urges before, I used to shake myself, wash my face, have a coffee, do something and go on... There must have been many times that the brain wanted to do something - and I never gave it a chance to... 

"Spasticity" is a term I've encountered only after my stroke. It is very common in the neuro recovery/ rehab world. It's when various parts of the body become stiff/rigid, either involuntarily or through limited muscle action but is not yet receiving messages from the brain to release/relax. sometimes your affected body part feels like a stone and sometimes very painful. But you just have to wait for it to relax on its own. It feels like nothing like a cramp. It starts with more intensity in the morning and reduces slowly as the day progresses, I guess as there are some movements and more blood circulation. I don't know. My sleep on most nights is very broken due to cough or waking up frequently for bathroom breaks or something else. It's rare that I get more than 1hr at one stretch. But what I have observed, more importantly, is that I have a very increased spasticity and I am able do something new which I never could before, when I have a good night's s