Cranial nerves Flashcards
Where does the olfactory nerve exit from skull?
Cribriform plate of ethmoid bone
What is the function of the olfactory nerve?
S: Smell
Where does the optic nerve exit from skull?
Optic foramen of sphenoid bone
What is the function of the optic nerve?
S: Vision
Where does the occulomotor nerve exit from skull?
supraorbital fissure of sphenoid bone
What is the function of the occulomotor nerve?
S/M: eye muscles
Where does the trochlear nerve exit from skull?
supraorbital fissure of sphenoid bone
What is the function of the trochlear nerve?
S/M: superior oblique muscle
Where does the ophtalmic nerve (V1) exit from skull?
supraorbital fissure of sphenoid bone
Where does the maxillary nerve (V2) exit from skull?
foramen rotundum of sphenoid bone
Where does the mandibular nerve (V3) exit from skull?
foramen ovale of sphenoid bone
What is the function of the trigeminal nerves?
S: facial, mouth, teeth, nasal cavity
M: mastication muscles
Where does the abducens nerve exit from skull?
supraorbital fissure of sphenoid bone
What is the function of the abducens nerve?
S/M: lateral rectus muscle
Where does the facial nerve exit from skull?
enters in internal acoustic meatus and exits stylomastoid foramen of temporal bone
What is the function of the facial nerve?
S: tongue (taste)
M: facial expression muscle, salivary glands
Where does the vestibulocochlear nerve exit from skull? What are the bones involved?
It does not exit from skull (internal acoustic meatus).
Temporal bone and petrous part
What is the function of the vestibulocochlear nerve?
S: hearing and balance
Where does the glossopharyngeal nerve exit from skull?
jugular foramen of petrous, temporal and occipital bones
What is the function of the glossopharyngeal nerve?
S: tongue (taste), pharynx
M: stylopharyngeal muscle
Where does the vagus nerve exit from skull?
jugular foramen of petrous, temporal and occipital bones
What is the function of the vagus nerve?
S: thoracic and abdominal viscera
M: pharynx, larynx
Where does the accessory nerve exit from skull?
jugular foramen of petrous, temporal and occipital bones
What is the function of the accessory nerve?
M: trapezius and sternocleidomastoid muscles
Where does the hypoglossal nerve exit from skull?
hypoglossal canal of occipital bone
What is the function of the hypoglossal canal?
M: tongue muscles
What nerve has the ethmoid bone involved?
olfactory nerve
What nerves have the sphenoid bone involved?
optic, occulomotor, trochlear, trigeminal, abducens nerves
What nerves exit from the jugular foramen?
glossopharyngeal, vagus and accessory nerves
What nerve has smell as a sensory function?
olfactory nerve
What nerve has vision as a sensory function?
optic nerve
What nerve has eye muscles as sensory and motor functions?
occulomotor nerve
What nerve has superior oblique muscle as sensory and motor functions?
trochlear nerve
What nerve has face, teeth, mouth, nasal cavity as sensory function and mastication muscles as motor function?
trigeminal nerve
What nerve has lateral rectus muscle as sensory and motor function?
abducens nerve
What nerve has tongue as sensory function and facial expression muscles, salivary glands as motor function?
facial nerve
What nerve has hearing and balance as sensory function?
vestibulocochlear nerve
What nerve has tongue and pharynx as sensory function and stylopharyngeal muscle as motor function?
glossopharyngeal nerve
What nerve has thoracic and abdominal viscera as sensory function and larynx & pharynx as motor nerve?
vagus nerve
What nerve has trapezius and sternocleidomastoid muscles as motor function?
accessory nerve
What nerve has tongue muscles as motor function?
hypoglossal nerve
Name all 12 cranial nerves and number.
olfactory (I), optic (II), occulomotor (III), trochlear (IV), trigeminal (opthalmic-V1, maxillary-V2, mandibular-V3), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), hypoglossal (XII)
