2.3 Cranial Nerves Part 2 Flashcards
What is the only cranial nerve that does not attach to the brainstem?
CN1 olfactory nerve
What is CN II?
optic nerve
What type of cranial nerve is CNII?
special sensory nerve
What is the function of CNII?
sense of sight
Where does CNII originate and terminate?
originates = retinas of each eye
terminates = thalamus
Where do the CNII nerves cross?
optic chiasm
What is CNIII?
occulomotor nerve
What type of cranial nerve is CN III?
motor nerve
What is the function of CN III?
eye movement in both somatic motor and visceral motor systems
What do the somatic motor movements of CN III control?
superior, inferior, an medial rectus
What do the visceral motor division of CN III control?
dilation of the pupil
What is CN IV?
trochlear nerve
What type of cranial nerve is CN IV?
somatic motor nerve
What is the function of CN IV?
eye movement
What does CN IV innervate?
superior oblique muscle of the eye
What is CN V?
trigeminal nerve
What type of cranial nerve is CN V?
mixed motor and sensory cranial nerve
What is the trigeminal nerve responsible for?
chewing
sensation of face, nose and mouth
What are the three branches of the trigenimal nerve?
ophthalmic branch
maxillary branch
mandibular branch
What is the opthalmic banch responsible for?
receiving sensory information from the skin around the forehead to the eyebrows and upper part of the nose
