The information that travels through the Nervous System uses three types of neurons:
Sensory neurons: They send information from the body tissues and sense organs to the Central Nervous System, which processes the information.
Interneurons: The processing mentioned above requires the participation of interneurons, which belong to the Central Nervous System and allow internal communication. Furthermore, they intervene between afferent sensory impulses and efferent motor impulses.
Motor neurons: They are responsible for transporting efferent information from the Central Nervous System to the muscles and glands.
Our most complex system is that of interneurons since we have a few million sensory and motor neurons but thousands and billions of interneurons.
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Fountain: Myers (2006), Psychology 7th edition, Editorial Médica Panamericana: Madrid