Video transcript
Voiceover: In this video I’m going to talk about the motor unit. The motor unit is made up of a couple of parts. The first part are what are called lower motor neurons. These are efferent neurons of the peripheral nervous system, meaning that they’re carrying information away from the central nervous system. These efferent neurons synapse on and control skeletal muscle. Let me just draw a red outline here for some of the skeletal muscle in the thigh. Skeletal muscle is the main muscle type of our body. It’s all over our body, and mostly connected to our skeleton, to move us around. The neurons of the nervous system that tell skeletal muscle when to contract are the lower motor neurons. The term motor unit refers to one lower motor neuron. Let me just draw a soma, and an axon coming out of this lower motor neuron. I’m going …