Cranial Nerves Flashcards
Where does the 1st cervical nerve exit?
Between the skull & upper most cervical vertebra
Where does the 3rd cranial nerve exit from?
From the midbrain
What are the functions of the 3rd cranial nerve?
- The majority of eye movements (Oculomotor)
- Pupillary light reflex
- Eye lid opening
Where does the 4th cranial nerve exit from?
From the midbrain
What is the function of the 4th cranial nerve?
Eye movement (Trochlear)
(specifically to move the eye downwards + inwards)
Where does the 5th cranial nerve originate from?
From the pons
What are the functions of the 5th cranial nerve?
- Facial sensation
- Supplies muscles of mastication
Where does the 6th cranial nerve exit from?
From the pons
What is the function of the 6th cranial nerve?
Abducting the eye (Abducens)
Where does the 7th cranial nerve exit from?
From the pons
What are the functions of the 7th cranial nerve?
- Facial movement
- Linked to sensation of tase
Where does the 8th cranial nerve exit from?
The medulla
What are the functions of the 8th cranial nerve?
- The vestibular component assists with detecting changes in body position against gravity.
- The Cochlear components is linked to hearing
(Vestibulocochlear)
Where does the 9th cranial nerve exit from?
The medulla
What are the functions of the 9th cranial nerve?
- Sensation to back of the tongue, pharynx + middle ear (Glossopharyngeal)
- Linked to gag reflex
Where does the 10th cranial nerve exit from?
The medulla
What are the functions of the 10th cranial nerve?
- Sensory input to pharynx + larynx
- Motor input to throat + soft palate
- Linked to the heart + abdominal organs
Where does the 11th cranial nerve exit from?
The medulla
What are the functions of the 11th cranial nerve?
- Motor in function
- Innervates sternocleidomastoid + trapezius muscles
Where does the 12th cranial nerve exit from?
The medulla
What is the function of the 12th cranial nerve?
Tongue movement (motor function + innervation)
(Hypoglossal)
How many pairs of cranial nerves are there?
12
What do cranial nerves control?
Control functions of face and special senses
Where do cranial nerves arise from?
Arise from the brainstem
What is the function of the 2nd cranial nerve?
Sight
Where does the 2nd cranial nerve exit?
From the forebrain
What is the function of the 1st cranial nerve?
Sense of smell (Olfactory)
Where does the 1st cranial nerve exit?
From the forebrain
What is the source of the cranial nerves?
The brainstem
