CN Nerves 2 Flashcards
what are CN 7-12?
CN VII: facial
CN VIII: vestibulochochlear
CN IX: glossopharnygeal
CN X: vagus
CN XI: accessory
CN XII: hypoglossal
Label A-C xx
describe path of Facial Nerve:
- emerges from?
- passes through which hole?
- exits skull via?
A: internal acoustic meatus
B: external acoustic meatus
C: stylo mastoid foramen
describe path of Facial Nerve:
- emerges from: pons
- passes through which hole: internal acoustic meatus
- exits skull via: stylo mastoid foramen
what are the three main branches of facial nerve (VII), what type of innervation do they provide?
greater pertrosal: parasympathetic innervation to lacrimal gland (eye fluid & tears)
chordae typmani:
- *- special sensory innervation to anterior 2/3rd of tongue;
- parasympathetic innervation to sublingual and submandibular glands**
motor root: TZBMC (two zulus bit my cat); temporal, zygomatic, buccal, marginal mandibular, cervical: motor muscles of facial expression
which of the following best describes the innervation provided by greater petrosal:
- sensory only
- sympathetic only
- parasympathetic only
- parasympathetic and sensory
- sympathetic and sensory
which of the following best describes the innervation provided by greater petrosal:
- sensory only
- sympathetic only
- *- parasympathetic only - lacrimal gland = tears**
- parasympathetic and sensory
- sympathetic and sensory
which of the following best describes the innervation provided by chorda tympani:
- sensory only
- sympathetic only
- parasympathetic only
- parasympathetic and sensory
- sympathetic and sensory
which of the following best describes the innervation provided by chorda tympani:
- sensory only
- sympathetic only
- parasympathetic only
- *- parasympathetic and sensory**
- sympathetic and sensory
- *- special sensory innervation to anterior 2/3rd of tongue;
- parasympathetic innervation to sublingual and submandibular glands**
What is A?
- frontalis
- oribuclaris oculi
- oribucalris oris
- occiptilas
- buccinator
What is A?
- frontalis
- oribuclaris oculi
- oribucalris oris
- *- occiptilas**
- buccinator
which of the following is the buccianator?
A
B
C
D
E
F
G
which of the following is the buccianator?
A
B
C
D
E
F
G
which of the following is the masseter?
A
B
C
D
E
F
G
which of the following is the masseter?
A
B
C
D
E
F
G
which of the following is the frontalis?
A
B
C
D
E
F
G
which of the following is the frontalis?
A
B
C
D
E
F
G
what are two main causes of facial muscle damage? [2]
what are two main causes of facial muscle damage? [2]
bells paulsy
stroke
describe the difference in innervation from facial nerve between upper and lower muscles of face?
muscles of upper part of face - frontalis: bilateral innervation - gets innervation from both contralateral and ipsilateral motor cortex ! (upper motor neurons from L & R of brain synapse the lower motor neuron, which innervates the frontalis)
muscles of lower part of face: just contralteral innervation one upper motor neuron from L or R, travel down and decussate and synapses with lower motor neuron
what would you expect to see clinically in a lesion of upper motor neuron in facial nerve? [1]
what would you expect to see clinically in a lesion of lower motor neuron in facial nerve? [1]
what would you expect to see clinically in a lesion of upper motor neuron in facial muscles? [1]
paralysis of lower facial musculature
what would you expect to see clinically in a lesion of lower motor neuron in facial nerve? [1]
paralysis of ipsilateral upper and lower faicial muscles
what happens when have Bells palsy?
- which part of facial nerve is affected?
- what does this present as?
what happens when have stroke palsy?
- which part of facial nerve is affected?
- what does this present as?
what happens when have Bells palsy?
- which part of facial nerve is affected: lower motor neuron
- what does this present as: ipsilateral total paralysis
what happens when have stroke palsy?
- which part of facial nerve is affected: upper motor neuron
- what does this present as: contralateral lower muscles paralsis
which part of brainstem does vestibulocholear nerve (CNVIII) come from?
midbrain
pons
medulla
which part of brainstem does vestibulocholear nerve (CNVIII) come from?
midbrain
pons
medulla
vestibulocholear nerve (CNVIII):
enters through which hole? [1]
function? [2]
vestibulocholear nerve (CNVIII):
enters through which hole: internal acoustic meatus
function: vestibular part: balance; cochlear: hearing
which foramen is this?
foramen ovale
foramen spinosum
Internal acoustic meatus
Foramen lacerum
Carotid canal
which foramen is this?
foramen ovale
foramen spinosum
Internal acoustic meatus
Foramen lacerum
carotid canal
what signs would you expect?
bitemporal hemianopia
opthalmoplegia
facial paraylsis, vertigo and hearing loss
dysphagia
what signs would you expect?
bitemporal hemianopia
opthalmoplegia
facial paraylsis, vertigo and hearing loss
dysphagia
glossophayngeal nerve leaves skull via which foramen?
catorid canal
Jugular foramen
Foramen lacerum
Hypoglossal canal
Foramen magnum:
glossophayngeal nerve leaves skull via which foramen?
catorid canal
Jugular foramen
Foramen lacerum
Hypoglossal canal
Foramen magnum:
glossopharnygeal nerve provides which types of innervation?
- sensory only
- parasympathetic and special sensory
- parasympathetic and sensory and motor
- sympathetic and sensory
- sensory, motor, special sensory and parasympathetic
glossopharnygeal nerve provides which types of innervation?
- sensory only
- parasympathetic and special sensory
- parasympathetic and sensory and motor
- sympathetic and sensory
- *- sensory, motor, special sensory and parasympathetic**
describe what innervation the glossopharyngeal innervation does for the following x
- sensory
- special sensory
- parasympathetic
- motor
describe what innervation the glossopharyngeal innervation does for the following x
- sensory: posterior: 1/3rd tongue, carotid body (BP); carotid sinus (o2), pharnyx
- special sensory: posterior 1/3rd tongue
- parasympathetic: parotid gland
- motor: stylophayngeus muscle (
vagus nerve provides which types of innervation?
- sensory only
- parasympathetic and special sensory
- parasympathetic and sensory and motor
- sympathetic and sensory
- sensory, motor, special sensory and parasympathetic
vagus nerve provides which types of innervation?
- sensory only
- parasympathetic and special sensory
- *- parasympathetic and sensory and motor**
- sympathetic and sensory
- sensory, motor, special sensory and parasympathetic
which part of brainstem does vagus nerve come from?
midbrain
pons
medulla
which part of brainstem does vagus nerve come from?
midbrain
pons
medulla
describe what innervation the vagus nerve innervation does for the following x
- sensory
- parasympathetic
- motor [4]
describe what innervation the vagus innervation does for the following x
- sensory: larynx (superior laryngeal and recurrent laryngeal nerve)
- parasympathetic: goes up to midgut
- motor: soft palate; pharynx; oesphagus; larynx (superior laryngeal and recurrent laryngeal nerve)
