Visceral motor fiber related ganglions of cranial n Visceral motor fiber of cranial nerve is parasympathetic nerve and they are contained in、Ⅷ、ⅸ、ⅹ cranial nerves.From CNS to effector, two neurons are needed. Their cell bodied are situated in brain stem and visceral ganglion Visceral motor fiber innervate smooth muscle, cardiac muscle and glands First-grade neuron Second-grade neuron smooth m ardiac m CNS PNS Visceral ganglion Somatic motor need only one neuron from CNS to PNS skeleton mVisceral motor fiber of cranial nerve is parasympathetic nerve and they are contained in Ⅲ 、 Ⅶ 、 Ⅸ 、 Ⅹ cranial nerves. From CNS to effector,two neurons are needed. Their cell bodied are situated in brain stem and visceral ganglion.Visceral motor fiber innervate smooth muscle, cardiac muscle and glands. Visceral motor fiber & related ganglions of cranial n First-grade neuron Second-grade neuron CNS PNS Visceral ganglion smooth m. cardiac m. glands. skeleton m. Somatic motor need only one neuron from CNS to PNS