Open Question
List the names of the 12 pairs of cranial nerves. (Hint: use the mnemonic device 'Oh, Once One Takes The Anatomy Final, Very Good Vacations Are Heavenly.' )
13. The Peripheral Nervous System
Introduction to the Peripheral Nervous System
Back13. The Peripheral Nervous System
Introduction to the Peripheral Nervous System
- Open QuestionDamage to the posterior spinocerebellar tract on the left side of the spinal cord at the L1 level would interfere with the coordinated movement of which limb(s)?
- Open QuestionHow many pairs of cranial nerves are there? Which are purely sensory? Which activates the chewing muscles? Which helps regulate heart rate and activity of the digestive tract?
- Open QuestionWhat region of the body is served by the dorsal rami of the spinal nerves? By the ventral rami?
- Open QuestionThe only cranial nerves that are attached to the cerebrum are the____ nerves. (a) optic, (b) oculomotor, (c) trochlear, (d) olfactory, (e) abducens.
- Open QuestionWhy do cervical nerves outnumber cervical vertebrae?
- Open QuestionJoseph, a man in his early 70s, was having problems chewing his food. He was asked to stick out his tongue. It deviated to the right, and its right side was quite wasted. What cranial nerve was impaired?
- Open Question
Fill in the blanks: A spinal nerve divides into a(n)_____ that serves the anterior side of the body and the limbs and a(n)_____that serves the posterior side of the body.
- Open Question
Define each of the following terms in your own words, using 20 or fewer words.
a. Peripheral nerve
- Open Question
Define each of the following terms in your own words, using 20 or fewer words.
b. Nerve plexus
- Open Question
Define each of the following terms in your own words, using 20 or fewer words.
c. Posterior root ganglion
- Open Question
First, write the Roman numeral that corresponds to each named cranial nerve (after the abbreviation CN). Second, match the cranial nerve with its correct function from the column on the right.
CN____
______Vestibulocochlear nerve
CN____
______Trigeminal nerve
CN____
_______Hypoglossal nerve
CN____
_______Abducens nerve
CN____
_______Vagus nerve
CN____
_______Olfactory nerve
CN____
_______Accessory nerve
CN____
_______Oculomotor nerve
CN____
_______Facial nerve
CN____
_______Optic nerve
CN____
_______Glossopharyngeal nerve
CN____
_______Trochlear nerve
a. Motor to the lateral rectus muscle
b. Motor to the muscles of facial expression; lacrimation; salivation; taste to the anterior two-thirds of the tongue
c. Sense of smell
d. Motor to the muscles for swallowing; salivation; taste to the posterior one-third of the tongue; somatic sensation from the throat
e. Senses of hearing and equilibrium
f. Motor to the superior oblique muscle
g. Motor to the tongue
h. Motor to the sternocleidomastoid and trapezius muscles
i. Sense of vision
j. Motor to muscles of swallowing and speaking; parasympathetic innervation to thoracic and abdominal viscera; sense of taste from the throat
k. Sensory to the face; motor to the muscles of mastication
l. Motor to four of six extrinsic eye muscles; constricts the pupil; changes the shape of the lens; opens the eyelid
- Open Question
Which cranial nerves are sensory only, primarily motor, and mixed?
- Open Question
Which two cranial nerves mediate the gag reflex?
- Open Question
Devise a series of physical examination tests that assess the function of each of the cranial nerves.