A multipolar neuron is a nerve cell that possesses a single long axon that contains many dendrites. The axon is the long, thin part of the neuron. The dendrites are the neuron's input sites and resemble branches from a tree. The axon carries information from the dendrites to the terminal buttons that are the output for the neuron. Multipolar neurons are the most common neurons present in the central nervous system. Brain neurons are another example of multipolar neurons.