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The PNS (Ch. 14)`
N/A
36
Anatomy
Undergraduate 2
10/17/2011

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Cards

Term
All spinal nerves are _____ nerves
Definition
mixed
Term
How many pairs of cranial nerves are there?
Definition
12
Term
We should say nerves are ____ to the brain/spinal cord
Definition
attached
Term
Each cranial nerve is either ___, ___, or ___
Definition
motor, sensory, mixed
Term
the olfactory nerve is composed of ___ ____ fibers
Definition
VERY SHORT
Term
Describe cranial nerve one
Definition
Olfactory; sensory; bipolar neurons pass through olfactory foramina; olfactory bulb IS NOT the CN1
Term
Describe CN III
Definition
Oculomotor; motor: moves the eyeball and eyelid
Term
Describe CN II
Definition
Optic; sensory: vision; passes through optic foramen into brain; runs from eyeball to chiasm
Term
Describe CN IV
Definition
Trochlear; motor: moves the eyeball; smallest CN; ONLY CN from dorsal brainstem
Term
Describe CN V
Definition
Trigeminal; mixed: motor (muscles of mastication) sensory (all facial sensations); largest cranial nerve
Term
Describe CN VI
Definition
Abducens; motor: moves the eyeball (abducts it); runs along middle of pons
Term
Describe CN VII
Definition
Facial; mixed: motor (facial expression) sensory (taste in anterior tongue); not to be confused with chewing muscles
Term
Describe CN VIII
Definition
Vestibulocochlear; sensory: equilibrium and hearing
Term
Describe CN X
Definition
Vagus; mixed: sensory (taste from throat region) motor (swallowing and speaking); ONLY CN to extend beyond head and neck
Term
Describe CN IX
Definition
Glossopharyngeal; mixed: sensory (taste for posterior tongue) motor (swallowing)
Term
Name some effector tissues of the vagus nerve
Definition
skeletal muscle, cardiac muscle, epithelial tissue, and smooth muscle
Term
Describe CN XI
Definition
Accessory; motor: coordinates head movements; sternocleidomastoid and trapezius muscles
Term
Describe XII
Definition
Hypoglossal; motor: tongue movement
Term
Where do the rootlets of CN 12 exit?
Definition
Between the olives and pyramids
Term
How many pairs of spinal nerves are there?
Definition
31
Term
The spinal nerve number corresponds with its vertebral number except in what area?
Definition
cervical vertebrae
Term
Below the cervical region, all spinal nerves exit ___ their respective vertebra
Definition
below
Term
Where does a sense have to travel through if it comes from the limbs?
Definition
ventral ramus
Term
What is another name for plexus?
Definition
network
Term
What is the primary location served by the nerve plexuses?
Definition
the limbs
Term
What are network plexuses composed of?
Definition
the ventral rami of the spinal nerves
Term
What nerves form the cervical plexus?
Definition
C1-C5
Term
What nerve innervates the diaphragm?
Definition
phrenic nerve
Term
What spinal nerves form the Brachial Plexus?
Definition
C4-T1
Term
What is the important nerve in the Brachial Plexus?
Definition
Ulnar nerve
Term
What spinal nerves form the Lumbar Plexus?
Definition
L1-L4
Term
Where is the Lumbar Plexus located?
Definition
psoas major
Term
What are the two important nerves of the Lumbar Plexus?
Definition
Femoral (anterior thigh) and Obturator (medial thigh)
Term
What nerves form the Sacral Plexus?
Definition
L4-S4
Term
What is the largest nerve in the body?
Definition
Sciatic nerve of the sacral plexus
Term
Define dermatome
Definition
area of the skin that provides sensory input to the CNS
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