-
Olfactory Origin, Effector & Number
- O: Olfactory epithelium of nose (smell)
- E: N/A
- N: I
-
Optic Origin, Effector, & Number
- O: Retina of eye (vision)
- E: N/A
- N: II
-
Oculomotor Origin, Effector & Number
- O: Proprioceptors of eyeball muscles
- E: Muscles that move eyeball; change shape of lens; constrict pupil
- N: III
-
Trochlear Origin, Effector, & Number
- O: Proprioceptors of eyeball muscles
- E: Muscles tha move eyeball
- N: IV
-
Trigeminal Origin, Effector & Number
- O: Teeth and skin of face
- E: Some muscles used in chewing
- N: V
-
Abducens Origin, Effector, & Number
- O: Proprioceptors of eyeball muscles
- E: Muscles that move eyeball
- N: VI
-
Facial Origin, Effector, & Number
- O: Taste buds of anterior part of tongue
- E: Muscles used for facial expression; submaxillary and sublingual salivary glands
- N: VII
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Vestibulocochlear (auditory) Vestibular Branch: Origin, Effector, & Number, Cochlear Brach
- Vestibular Branch
- O: Semicircular canals of inner ear (senses of movement, balance, and rotation)
- E: N/A
- Cochlear Branch
- O: Cochlea of inner ear (hearing)
- E: N/A
- N: VIII
-
Glossopharyngeal Origin, Effector, & Number
- O: Taste buds of posterior 3rd of tongue and lining of pharanx
- E: Parotid salivary gland; muscles of pharynx used in swallowing
- N: IX
-
Vagus Origin, Effector, & Number
- O: Nerve endings in many of the internal organs (e.g., lungs, stomach, aorta, larynx)
- E: Parasympathetic fibers to heart, stomach, small intestine, larynx, esophagus, and other organs
- N: X
-
Spinal accessory Origin, Effector, & Number
- O: Muscles of shoulder
- E: Muscles of neck and shoulder
- N: XI
-
Hypoglossal Origin, Effector, & Number
- O: Muscles of tongue
- E: Muscles of tongue
- N: XII
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