Chapter 13  Peripheral Nervous System

 

Objectives:

 

Learn the twelve cranial nerves, whether they are sensory or motor and their specific function.

Learn the categories of the thirty-one spinal nerves.

 

 

I.  Cranial Nerves (Page 500)

 

Memory Aid for learning the cranial nerves:  "On occasion, our trusty truck acts funny- very good vehicle anyhow."

 

Memory Aid for remembering the functions of the cranial nerves (as sensory, motor or both):  "Some say marry money, but my brother says (it's) bad business (to) marry money."

 

Cranial Nerves

Sensory Function

Motor Functions

Specific Function

I.  Olfactory

Yes

No

Smell

II.  Optic

Yes

No

Vision

III. Oculomoter

No

Yes

Eye Muscle Movement

IV.  Trochlear

No

Yes

Eye Muscle Movement to one of the extrinsic eye muscles

V.  Trigeminal

Yes

Yes

General sensory of the face, Motor fibers for chewing muscles, General sensory of the nasal cavity, palate, upper teeth

VI.  Abducens

No

Yes

Motor nerve to one of the extrinsic muscles of the eye.

VII.  Facial

Yes

Yes

Sensory-Taste; Motor- facial expression, tear glands, nasal glands, salivary glands.

VIII.  Vestibulocochear

Yes

No

Hearing and Balance

IX.  Glossopharyngeal

Yes

Yes

Sensory-taste

Motor-Swallowing

X.  Vagus

Yes

Yes

Sensory- Taste

Motor- Swallowing, heart rate, breathing, digestive system activity.

XI.  Accessory

No

Yes

Move head and neck

XII.  Hypoglossal (Under tongue)

No

Yes

Movement of tongue involved in speech and swallowing

 

 

Distribution of Spinal Nerves