What causes the tentacles of the octopus to still move after being cut?

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What causes the tentacles of the octopus to still move after being cut?

In: Biology

Octopuses have a unique nervous system – only about 1/3 of their neurons are in their brains, while the rest are in their arms. What this essentially means is that each arm has its own “brain” and can function without any input from the octopus’s actual brain.

Adding to the first post, the arms can sense “fear” even after being cut off and they actually respond to that fear – due to receptors that would make it react to stimuli.