What are the three broad categories of neurons?

Functional types of neurons:

1. sensory (afferent) neurons - input to CNS from sensory receptors; dendrites located at receptors, axons in nerves, cell bodies in ganglia outside the CNS

2. motor (efferent) neurons - output from CNS to effectors cell bodies and dendrites located in the CNS, axons in nerves

3. interneurons - communicate and integrate information within the CNS;

located entirely within the CNS