CRANIAL NERVES & RECEPTOR SITES FINAL
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What are the 3 levels of the brainstem?
What is cranial nerve I?
WHat is Cranial nerve II?
What is cranial nerve III?
What is cranial nerve IV?
What is cranial nerve V?
What is cranial nerve VI?
What is cranial nerve VII?
What is cranial nerve VIII?
What is cranial nerve IX?
What is cranial nerve X?
What is cranial nerve XI?
What is cranial nerve XII?
What does the olfactory nerve control?
Sense of smell
What does the optic nerve control?
What does the oculomotor nerve control?
Eyelid & eyeball movement
What does the trochlear nerve control?
Lateral & downward movement of the eye
What does the trigeminal nerve control?
- Face & mouth touch & pain
What does the abducens nerve control?
Lateral eye movement
What does the facial nerve control?
- Facial movements
- Secretion of tears & saliva
What does the vestibulocochlear nerve control?
- Sensation of equillibrium
What does the Vagus nerve control?
- Aortic BP
- Slows HR
- Stimulates digestive organs
What does the accessory nerve control?
- Trapezius & sternocleidomastoid muscles
- Swallowing movements
What does the hypoglossal nerve control?
Stimulation of Alpha 1 receptor sites causes what?
- Contraction of smooth muscle
Stimulation of Alpha 2 receptor sites causes what?
- Vasodilation of arteries
- Vasoconstriction of veins
Stimulation of Beta 1 receptors causes:
- Increase HR in SA Node
- Increase Contractility
- Increase automaticity
- Increase conduction @ AV node
Explain chronotropic effects on the heart:
Those that change HR
Explain dromotropic effects on the heart:
Agents that affect conduction in the AV node
Explain inotropic effects on the heart:
Agent that alters contraction force of the heart
Stimulation of Beta 2 receptors causes:
Smooth muscle relaxation causing bronchodilation
What is CN I and how do we test it?
- Odor in 1 nostril then the other
What is CN II and how do we test it?
What is CH III and how do we test it?
- "H" pattern test
What is CN IV and how do we test it?
- "H" pattern test
What is CN V and how do we test it?
- Clench teeth & palp temporal & masseter muscles
What is CN VI and how do we test it?
What is CN VII and how do we test it?
- Facial symmetry, eyelid droop, abnormal movements
What is CN VIII and how do we test it?
- Test hearing & balance with eyes closed
What is CN IX & how do we test it?
- Say "ahhh" watch for soft palate & uvula to rise symmetrically
What is CN X & how do we test it?
- Eval speech, swallowing, gag reflex & say "ahhh"
What is CN XI & how is it tested?
- Raise shoulders against resistance
- Turn head against resistance
What is CN XII & how is it tested?
Assess speech & midline projection
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