cranial nerves, and their functions

CN I – Olfactory

sensory nerve, function is smell

CN II – Optic

sensory nerve, function is vision

CN III – Oculomotor

motor nerve, functions are to move eye muscles, raise eyelids, and constrict pupils

CN IV – Trochlear

motor nerve, function is to move eyes

CN V – Trigeminal

• sensory function is touch, pain and temp in the face

• motor function is muscles of chewing

CN VI - Abducens

motor nerve, function is to move eyes laterally (lateral rectus muscle)

CN VII - Facial

• motor function is facial expression

• sensory function is taste

CN VIII - vestibulocochlear

sensory nerve, functions are hearing (cochlear), and balance (vestibular)

CN IX – Glossopharyngeal

• sensory function is tate

• motor function is swallowing

CN X – Vagus

• sensory function is internal organs

• motor function is the voice and swallowing

CN XI – Accessory

motor nerve, function is to control neck muscles

CN XII – Hypoglossal

motor nerve, function is tongue movement

what are the 4 cranial nerves that carry parasympathetic functions

1. CN III - oculomotor

2. CN VII - facial

3. CN IX - glossopharyngeal

4. CN X - vagus (most important)

CN III – Oculomotor parasympathetic function

• Constricts the pupil

• Adjusts the lens for focusing

CN VII – Facial parasympathetic functions

• Stimulates tear glands

• Stimulates salivary glands (submandibular & sublingual)

CN IX – Glossopharyngeal parasympathetic function

Stimulates the parotid salivary gland

CN X – Vagus parasympathetic functions

Controls parasympathetic activity in:

• Heart (slows heart rate)

• Lungs

• Digestive organs