Octopus Arms Function Independently, Housing Two-Thirds of the Animal's Neurons

Octopuses possess a highly decentralized nervous system, with approximately two-thirds of their neurons located in their arms rather than their brain. Each arm is capable of operating independently, processing sensory information and executing movements on its own. This neural autonomy means the arms can react and function without direct instruction from the central brain. Even the arm used for reproduction operates under this same independent neural framework. Scientists study this unique arrangement to better understand distributed intelligence in animals.