SPPAWA, thanks for taking a shot at my specific questions!

so if i'm understanding you correctly, there's a part of my brain that "senses" what my body is, and it feels the need to check up on different body parts to make sure that they're working OK. when i have an urge to stretch my wrist, it might be because it's been still for too long; stretching my wrist does the following:
- reassures the somatosensory cortex that my wrist is still OK
- promotes blood flow / fuel flow, which can prevent the muscles associated with my wrist from fatiguing, which can help prevent the ligaments and tendons from working too hard.

thank you for this information!