Normally, the coordinated action of the muscles of the stomach and small intestine propels the food from the stomach, through the small intestine and into the colon. This muscular action also sweeps bacteria out of the small intestine and limits the numbers of bacteria in the small intestine.
The term 'motor neuron' is usually restricted to the efferent neurons that actually innervate muscles (the lower motor neurons). A single motor neuron may innervate many muscle fibres and a muscle fibre can undergo many action potentials in the time taken for a single muscle twitch.
Psychology Glossary. Motor Neurons. As you know, information is traveling throughout your brain and body all the time. As I type this definition, information is traveling from my brain to the muscles in my arms, hands, and fingers to press the right keys. To make my fingers press the right keys, the information travels on motor neurons -- neurons that carry information from the central nervous system to the muscles to make these movements.