system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Do the brain squiggles wiggle?

I bear the question of brain squigglies. I understand the brain is like electric jello soup in a bone bowl, but doesn’t it ever move? Does it twitch when we think or move? Can complex things happen that make it move? Are there micro movements? Does it need movement, like other muscles and organs do?
gpt
The brain does squiggle wiggle, but not on its own. There are no muscles in the brain so it can't move itself, but it is jiggly so if you whack it, it will be wiggly. This is what happens when people get a concussion, the brain is smooshed up against the inside of the skull by an impact.

Thinking won't make the brain move itself but it can increase blood flow, and the pulse of blood can create some small movement. In effect the heart can move the brain a little bit. Movement isn't required for the brain to think and in fact it is generally detrimental.