Interneurons can be further broken down into two groups: local interneurons and relay interneurons.[1][need quotation to verify] Local interneurons have short axons and form circuits with nearby neurons to analyze small pieces of information.[2] Relay interneurons have long axons and connect circuits of neurons in one region of the brain with those in other regions.[3] The interaction between interneurons allow the brain to perform complex functions such as learning, and decision-making.