<unk> s <unk> s) are the motor<unk> s connecting the brainstem and spinal cord to muscle fibers, bringing the nerve impulses from the upper motor<unk> s out to the muscles.
Lower motor neuron
Upper motor neuron
Spindle neuron
Interneuron
Dendritic spine
Free nerve ending
Postganglionic fibers
Dorsal root ganglion