Introduction to Cranial Nerve Summary Regions supplied by sensory branches Muscles supplied by motor branches Exit from cranial cavity and pathway in head and neck

Cranial Nerve TYPE 1Olfactory (I)Some 2Optic (II)Say 3Oculomotor (III)Marry 4Trochlear (IV)Money 5Trigeminal (V)But 6Abducens (VI)My 7Facial (VII)Brother 8Vestibulocochlear (VIII)Says 9Glossopharyngeal (IX)Better 10Vagus (X)Brains 11Accessory (XI)Matter 12Hypoglossal (XII)Most Sensory vs Motor vs Both?

Cranial Nerve TYPE 1Olfactory (I)Sensory 2Optic (II)Sensory 3Oculomotor (III)Motor 4Trochlear (IV)Motor 5Trigeminal (V)Both 6Abducens (VI)Motor 7Facial (VII)Both 8Vestibulocochlear (VIII)Sensory 9Glossopharyngeal (IX)Both 10Vagus (X)Both 11Accessory (XI)Motor 12Hypoglossal (XII)Motor Sensory vs Motor vs Both?

Cranial Nerve Parasympathetic 1Olfactory (I) 2Optic (II) 3Oculomotor (III)yes 4Trochlear (IV) 5Trigeminal (V) 6Abducens (VI) 7Facial (VII)yes 8Vestibulocochlear (VIII) 9Glossopharyngeal (IX)yes 10Vagus (X)yes 11Accessory (XI) 12Hypoglossal (XII) Which Cranial Nerves Carry Preganglionic Parasympathetic Fibers Out Of The Brain? "hitch a ride on five"

3 Oculomotor (III)Ciliary 7 Facial (VII)Submandibular Pterygopalatine 9 Glossopharyngeal (IX)Otic 10 Vagus (X) "in walls of organs" Four Parasympathetic Ganglia Cranial Nerve Ganglia

1. Cranial nerves are either pure sensory, pure motor or mixed with both sensory and motor components. 2. Four of the cranial nerves carry preganglionic parasympathetic fibers out of the brain and three of these are associated with one or more of the parasympathetic ganglia in the head. 3. Four of the cranial nerves represent the nerves which are associated with one or more of the pharyngeal (branchial) arches. Introduction to Cranial Nerve Summary

Cranial Nerves Associated with Pharyngeal Arches Innervate Muscles Derived from the Arches 1Trigeminal (Mandibular-V3) 2Facial (VII) 3Glossopharyngeal (IX) 4Vagus (X) - sup. laryngeal n. 6Vagus (X) - rec. laryngeal n. Arch Cranial Nerve (5) (7) (9) (10)

Horner Syndrome Results From Injury to the Cervical Sympathetic Trunk Constricted left pupil (meiosis) Mild drooping of the left eyelid (ptosis) Lack of sweating on the left side of face (anhydrosis) Flushed complexion on the left side of the face (vasodilation) asymmetry

Bell’s Palsy - Facial Nerve Paralysis "asymmetry""inability to close tightly" "slight droop" neutral positionsmileeyes closed "Bell's Palsy" is a paralysis of the Facial nerve for no obvious reason. It may occur due to exposure to cold or inflammation that occurs near the stylomastoid foramen which compresses the fibers.

5Trigeminal (V) Great Sensory Nerve of the Head 8 muscles (4 muscles mastication, 2 neck, 2 tensors) Summary of the Four Major Cranial Nerves-See Dr. Tank Handout 7Facial (VII) Glandular Nerve of the Head (2 PS ganglia) muscles of facial expression, 2 neck, 1 middle ear taste; sensory to ear 9Glossopharyngeal (IX) Sensory Nerve of Throat; taste; carotid body/sinus middle ear sensory 1 muscle - stylopharyngeus m 1 PS ganglia (otic) supplying 1 gland (parotid) 10Vagus (X) Motor and sensory to pharynx and larynx; viscera PS