Head and Neck II study guide The face What is the psychological importance of the muscles of facial expression? What is the physiological importance? Get ready. What are the cranial nerves? What are their basic functions? Which are parasympathetic? What openings of the cranium do each of them traverse? What happens if the nerve is severed? What is the cutaneous nerve supply of the face? What is trigeminal neuralgia? What is the blood supply of the face? Venous drainage? How can infections in the superficial veins of the face transfer to the deep veins? Where are the following muscles of facial expression? Occipitofrontalis, zygomaticus major, orbicularis oculi, orbicularis oris, depressor anguli oris, platysma, levator anguli oris, buccinator. The facial n. innervates what muscles of facial expression? What is Bell's palsy? Preganglionic axons enter only 4 cranial nerves. What are these nerves? What ganglia do they synapse on? What is their distal nerve branch? What function do they provide? What is the difference between a nucleus and a ganglion? What are the layers of the scalp? Which layer is most prone to the passing of infections?