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what is CN I?
olfactory nerve
what functional component does CN I have?
visceral afferent (VA) - sensory for smell
what is CN II?
optic nerve
what functional component does CN II have?
somatic afferent (SA) - sensory for sight
what is CN III?
oculomotor nerve
what functional components does CN III have?
- somatic efferent (SE)- innervates extrinisc eye muscles except superior oblique and lateral rectus
- visceral efferent (VE)- innervates pupillary sphincter and ciliary muscles
what is CN IV?
trochlear nerve
what functional components does CN IV have?
somatic efferent (SE)- innervates superior oblique
what is CN V?
trigeminal nerve
what are the 3 regions of CN V?
V1 = ophthalmic
V2 = maxillary
V3 = mandibular
what are the functional components of CN V1?
somatic afferent (SA) - sensation of pain, temperature, pressure, touch of the upper face
what are the functional components of CN V2?
somatic afferent (SA) - sensation of pain, temperature, pressure, touch of the mid face
what are the functional components of CN V3?
- somatic afferent (SA) - sensation of pain, temperature, pressure, touch of lower face, anterior 2/3 of tongue and part of ear
- somatic efferent (SE) - innervates muscles of mastication
what is CN VI?
abducens nerve
what functional components does CN VI have?
somatic efferent (SE) - innervates lateral rectus muscle
what is CN VII?
facial nerve
what functional components does CN VII have?
- somatic afferent (SA) = touch, pain, pressure, and temperature for part of ear
- somatic efferent (SE) = innervates muscles of facial expression
- visceral afferent (VA) = sensation from anterior 2/3 of tongue
- visceral efferent (VE) = innervates lacrimal glands and salivary glands (parasympathetic innervation)
which nerves have all four functional components?
CN VII, IX, X
what is CN VIII?
vestibulocochlear nerve
what functional component does CN VIII have?
somatic afferent (SA) = sensation of hearing and balance
what is CN IX?
glossopharyngeal nerve
what functional components does CN IX have?
- somatic afferent (SA) = sensation of touch, pain, pressure, & temperature for posterior 1/3 of tongue & part of ear
- somatic efferent (SE) = innervates stylopharangeus
- visceral efferent (VE) = innervates parotid salivary gland
- visceral afferent (VA) = sensation of taste from posterior 1/3 of tongue, sensations of reflex or pain for oropharynx, carotid sinus & carotid body
what is CN X?
vagus nerve
What functional components does CN X have?
- somatic efferent (SE) = innervates pharynx & larynx
- somatic afferent (SA) = sensations of touch, pain, pressure, temperature for part of ear
- visceral afferent (VA) = sensations of reflex or pain for pharynx, larynx, epiglottis, viscera to transverse colon
- visceral efferent (VE) = innervates pharynx, larynx, heart, viscera to transverse colon
what is CN XI?
accessory nerve
what functional component does CN XI have?
somatic efferent (SE) = innervates trapezius & sternocleidomastoid
what is CN XII?
hypoglossal nerve
what functional component does CN XII have?
somatic efferent (SE) = innervates tongue muscles except palatoglossus
what does somatic mean?
means innervation to the body wall & or limbs
what does visceral mean?
means innervation to the internal organs
what does afferent mean?
sensory
what does efferent mean?
motor
what is the mnemonic for CN I-XII?
One of our top teachers asked for very good vodka and honey
what is the mnemonic for functional components of CN I-XII?
Some Say Marry Money But My Brother Says Big Brains Matter More
which cranial nerves have visceral afferent?
CN I, CN VII, CN IX, CN X (olfactory, facial, glossopharyngeal, vagus)
which cranial nerves have visceral efferent?
CN III, CN VII, CN IX, CN X (oculomotor, facial, glossopharyngeal, vagus)
which cranial nerves have somatic afferent?
CN II, CN V, CN VII, CN VIII, CN IX, CN X (optic, trigeminal, facial, vestibulocochlear, glossopharyngeal, vagus)
which cranial nerves have somatic efferent?
CN III, CN IV, CN V, CN VI, CN VII, CN IX, CN X, CN XI, CN XII (oculomotor, trochlear, trigeminal, abducens, facial glossopharyngeal, vagus, accessory, hypoglossal)
What is the mnemonic for VA cranial nerves?
Old Factories Go Vacant (Olfactory, facial, Glossopharyngeal, vagus)
What is the mnemonic for VE cranial nerves?
Only Friendly Girls Vent (Oculomotor, facial, glossopharyngeal, vagus)
What is the mnemonic for SE cranial nerves?
Often The Teachers Are Friendly Grumpy Violent And Happy (oculomotor, trochlear, trigeminal, Abducens, facial, glossopharyngeal, vagus, accessory, hypoglossal)
What is the mnemonic for SA cranial nerves?
Old Teachers Feel Very Grumpy Vibes (optic, trigeminal facial, vestibulocochlear, glossopharyngeal, vagus)