Cranial Nerves Flashcards
which foramen does the olfactory nerve pass through?
cribiform
which foramen does the optic nerve pass through?
optic canal
which foramen does the oculomotor nerve pass through?
superior orbital fissure
which foramen does the trochlear nerve pass through?
superior orbital fissure
which foramen does the opthalamic V1 branch pass through?
superior orbital fissure
which foramen does the V2 maxillary branch pass through?
foramen rotundum
which foramen does the V3 mandibular branch pass through?
foramen ovale
which foramen does the abducens nerve pass through?
superior orbital fissure
which foramen does the facial nerve pass through?
internal acoustic meatus
which foramen does the vestibulocochlear nerve pass through?
internal acoustic meatus
which foramen does the glossopharyngeal nerve pass through?
jugular foramen
which foramen does the vagus nerve pass through?
jugular foramen
which foramen does the accessory nerve pass through?
jugular foramen
which foramen does the hypoglossal nerve pass through?
hypoglossal canal
label the nerves
what type of fibres are present in cranial nerve I?
special sensory
what plate of bone do the branches of CN I enter into the anterior cranial fossa?
ethmoid bone
what type of fibres are present in cranial nerve II?
special sensory
which type of fibres are present in CN III, IV & VI?
motor
CN III > motor and parasympathetic
what type of fibres are present in CN V1?
general sensory
what type of nerve fibres are present in CN V2?
general sensory
what type of nerve fibres are present in CN V3?
- general sensory (anterior 2/3 of tongue)
- motor (mastication)
which type of fibres are present in CN VII?
- general sensory
- special sensory (ant. 2/3 of tongue)
- motor (facial expression m.)
- parasympathetic > sublingual and submandibular salivary glands
which type of fibres are present in CN VIII?
special sensory
which type of fibres are present in CN IX?
- general sensory
- special sensory (post 1/3 of tongue)
- motor (stylopharyngeus)
- parasympathetic > parotid gland
which type of fibres are present in cranial nerve X?
- general sensory
- special sensory (root of tongue and epiglottis)
- motor (GI tract, muscles of pharynx and larynx, palatoglossus, soft palate muscles)
- parasympathetic
what plexus does cranial nerve X form part of and what does it innervate?
oesophageal plexus
- innervates the smooth muscle of oesophagus
name two branches of CN X that innervate the muscles of the larynx
left recurrent laryngeal nerve
external branch of superior laryngeal nerve
which type of fibres are present in cranial nerve XI?
motor (trapezius and SCM)
what type of fibres are present in CN XII?
- motor > intrinsic and extrinsic tongue muscles except for palatoglossus
which of the cranial nerves have a parasympathetic component?
oculomotor
facial
glossopharyngeal
vagus
so 3, 7, 9 and 10
which cranial nerves are attached directly to the brain?
olfactory and optic
which cranial nerves are attached directly to midbrain?
III and IV
which is the only cranial nerve to arise from the posterior aspect of the brain?
trochlear IV
which cranial nerves are attached directly to the medulla?
IX, X, XI, XII
which cranial nerve(s) are attached directly to the pons?
trigeminal V
which cranial nerves are attached directly to the pontomedullary junction?
VI, VII, VIII
which cranail nerve can be tested by the pupillary light reflex?
oculomotor nerve CN III
which cranial nerve can be tested by touch over the surface of the cheek?
trigeminal nerve CN V
what cranial nerve would you be testing if you asked a patient to stick their tongue out?
hypoglossal CN XII
