Science Memes

10348 readers

2333 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules

Don't throw mud. Behave like an intellectual and remember the human.
Keep it rooted (on topic).
No spam.
Infographics welcome, get schooled.

Research Committee

[email protected]

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago

MODERATORS

[email protected]

521

zzz (mander.xyz)

submitted 5 months ago by [email protected] to c/[email protected]

17 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 5 months ago (2 children)

But then why is it that it feels like the blood flows back into my arm and that only after a few seconds, I can move my hand again.

Like, my hand literally cramps up as if it's actually lost blood flow and can only move once (as it feels) the blood circulates back throughout.

[–] [email protected] 7 points 5 months ago* (last edited 5 months ago)

Your nerves are responsible for making your muscles move. Blood only keeps them alive, and it takes quite a while for lack of blood to actually matter. A rule for tourniquets in medicine is 4 hours if you want to keep your limb without permanent damage.

A good indicator if blood flow was actually cut off is if your limb is extremely pale (within just 1 or 2 minutes) or later goes blue. But if your nerves are unblocked, you can still move your limb for quite a while even without blood flow. Usually though, if blood is cut off, nerves also are.

[–] [email protected] 7 points 5 months ago

Because the nerves are compressed. You move and feel your body via nerves.