Lecture 20: Cranial Nerves - B Flashcards
_____: Organ made of nerve fibers (+ connective tissue) that connects CNS to periphery (muscles, glands, skin)
Nerve
How many spinal nerves serve the body? cranial?
31 spinal nerves (body)
12 cranial nerves (head and neck)
The vagus nerve also supplies the ___ and ___
thorax and abdomen
Most cranial nerve nuclei receive ___ innervation from the cortex
A. bilateral
B. unilateral
A. bilateral
True or False: If one has an UMN lesion, ipsilateral muscles are paralyzed. However, if one has a LMN lesion, muscle function is intact
False
LMN lesion = ipsilateral m paralyzed
UMN lesion = function intact
True or False: The number of cranial nerves decreases rostral to caudal
False - there’s an INCREASE
The medial cranial nerves tend to have ____ function while the lateral ones have ____ function
motor; sensory
Which CN’s have sensory function?
fdf
Which CN’s have motor function?
fdds
Which CN’s have both motor and sensory function?
Which four CN’s are found in the medulla?
CN 9-12
Which three CN’s are found in the pons?
CN 5-7
Which two CN’s are found in the midbrain?
Oculomotor and Trochlear
Which CN innervates the superior, inferior & medial rectus, inferior oblique
A. CN 3
B. CN 4
C. CN 5
D. CN 6
A. CN 3
CN ___ innervates the superior oblique while CN ____ innervates the lateral rectus
A. CN 4; CN 6
B. CN 6; CN 4
C. CN 2; CN 6
A. CN 4; CN 6
True or False: CN 3 adducts and abduccts
True
True or False: CN IV is important for intorsion of superior oblique while CN III is important for extorsion of inferior oblique
True
Where are the oculomotor nerve and the Edinger-Westphal nucleus located?
A. medulla
B. midbrain
C. pons
B. midbrain
Which CN mediates conscious eye
movements and reflexes?
Oculomotor nerve
Which 2 structures are innervated by the oculomotor nerve??
extraocular muscles &
levator palpebrae superioris
Where are the Inferior Salivatory + Nucleus Ambiguus located?
Medulla
