1 Sensory neurons carry signals from the outer parts of your body (periphery) into the central nervous system. 2  Motor neurons (motoneurons) carry signals from the central nervous system to the outer parts (muscles, skin, glands) of your body.3  Interneurons connect various neurons within the brain and spinal cord. Motor neurons (motoneurons) carry signals from the central nervous system to the outer parts (muscles, skin, glands) of your body. 2  Interneurons connect various neurons within the brain and spinal cord.