Speaker 1: Welcome to brain Stuff from house stuffworks dot com where
Speaker 1: smart happens. Hi Marshall Brain. Have you ever gotten up
Speaker 1: from your chair or woken up in the middle of
Speaker 1: the night and discovered that one of your arms or
Speaker 1: legs is falling completely asleep? What causes that? Most of
Speaker 1: the time when something falls asleep, it happens because your
Speaker 1: position squeezes some nerves. The pressure causes the nerves to
Speaker 1: stop sending signals, so your brain can't control any of
Speaker 1: the muscles, and you also can't feel a thing. Once
Speaker 1: you remove the pressure, you don't regain feeling right away.
Speaker 1: There's a certain amount of readjustment time before the nerves
Speaker 1: can transmit impulses correctly. Again, some nerve cells don't transmit
Speaker 1: any information, and others start sending impulses erratically. This causes
Speaker 1: that strange tingling sensation. Motor control fivers are thinner than
Speaker 1: the ones carrying touch information, so you can often move
Speaker 1: the body part before you've regained complete feeling in it.
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