Neurons have different shapes depending on their functions. Interneurons carry information between motor and sensory neurons. Sensory neurons carry information to the central nervous system. Motoneurons carry signals from the central nervous system to the muscles, skin, and glands and pyramidal neurons are involved with motor control and cognitive ability. http://health.howstuffworks.com/human-body/systems/nervous-system/brain-pictures24.htm
Light micrograph of synapses between a motor neurone (tree-like) & skeletal muscle cells (bands in background). The end of the axon (large fibre) of a motor neurone in contact with a muscle cell divides into branches, each one terminating in a motor end plate on a different muscle fibre.