Cranial Nerves Flashcards
What is Cranial Nerve I Called?
Olfactory
What is Cranial Nerve II Called?
Optic
What is Cranial Nerve III Called?
Oculomotor
What is Cranial Nerve IV Called?
Trochlear
What is Cranial Nerve V Called?
Trigeminal
What is Cranial Nerve VI Called?
Abducens
What is Cranial Nerve VII Called?
Facial
What is Cranial Nerve VIII Called?
Vestibulocochlear
What is Cranial Nerve IX Called?
Glossopharyngeal
What is Cranial Nerve X Called?
Vagus
What is Cranial Nerve XI Called?
Accessory
What is Cranial Nerve XII Called?
Hypoglossal
What is the function of the olfactory nerve?
Conscious perception of smell
What is the function of CN II?
Vision
What structures does CN III innervate?
Dorsal/Ventral/Medial Recti Muscles
Ventral Oblique Muscle
Levator Palpebrae Superioris
Papillary Constriction
What does the trochlear never innervate?
Dorsal Oblique Muscle
Which of the following innervates the ipsilateral eye muscles:
CN III or CN IV?
CN III (oculomotor)
CN IV= contralateral
Which CN has the following 3 branches:
Ophthalmic, Maxillary and Mandibular?
Trigeminal (V)
What does the trigeminal nerve innervate for sensory perception?
Face
What does the trigeminal nerve innervate for motor function?
Mucous membranes
What does the abducens innervate?
IPSILATERAL lateral rectus
Retractor bulbi
What does the facial nerve innervate for motor function?
Muscles of Facial Expression
What parasympathetic innervation does CN VII contain?
lacrimal, mandibular & sublingual glands
What does the facial nerve innervate for sensory perception?
ROSTRAL 2/3 of tongue
What is the function of CNVIII?
Hearing and Vestibular Function
What parasympathetic innervation does CN IX contain?
parodic and zygomatic glands
What does the glossopharyngeal nerve innervate for sensory perception?
Caudal 1/3 tongue
Pharynx
What does CN IX innervate for motor function?
Pharynx
Palate
What does the motor portion of CN X innervate?
Larynx, pharynx, oesophagus
What does the sensory portion of CN X innervate?
larynx/pharynx
Thoracic viscera
Abdominal viscera
What does the parasympathetic portion of CN X innervate?
All thoracic and abdominal viscera (except pelvic region)
What does the accessory nerve innervate?
Trapezius
Partial Sternocephalicus
Partial Brachiocephalicus
What does the hypoglossal nerve innervate?
Tongue - motor
Where do the axons of CN I run?
Pass cribriform plate
Synapse: olfactory bulb
Where do the axons of CN II run?
Caudally: enter skull via optic canal
Join at: optic chiasm
Where do the axons of CN III run?
Exit via orbital fissure
Where is the nucleus of CN III?
Midbrain
Where do the axons of CN IV run?
Exit via orbital fissure
Where is the nucleus of CN IV?
Caudal Midbrain
Where are the nuclei of CN V?
Motor: pons
Sensory: through brainstem
Where do the axons of CN VI run?
Exit via orbital fissure
Where is the nucleus of CN VI?
Rostral Medulla
Where are the nuclei of CN VIII?
Vestibular: Medulla
Cochlear: Medulla
Where is the nucleus of CN IX?
shares nuclei with X in caudal medulla
Where is the nucleus of CN X?
shares nuclei with IX in caudal medulla
Where is the nucleus of CN XI?
Caudal medulla
Where is the nucleus of CN XII?
Caudal Medulla
Where do the axons of CN XII exit?
Via Hypoglossal Foramen
