There are several different types of neurons. Sensory neurons carry signals from the outer parts of your body into the central nervous system or CNS. For example, if somebody puts ice on your hand, the sensory neurons send the message from your hand to your central nervous system telling you the ice is cold. Motor neurons carry signals from the central nervous system to the outer parts of your body doing the opposite of sensory neurons. For example, if you were driving, the motor neurons would take the message from your central nervous system to your hand telling you to turn the key. Receptors sense the environment and encode this information into electrochemical messages sent by sensory neurons. Inter neurons act as highways or bridges connecting neurons within the brain and spinal cord.