cranial nerves Flashcards
what is the name of CN i?
olfactory
what is the name of CN ii?
optic
what is the name of CN iii?
oculomotor
what is the name of CN iv?
trochlear
what is the name of CN v?
trigeminal
what is the name of CN vi?
abducens
what is the name of CN vii?
facial
what is the name of CN viii?
vestibulochlear
what is the name of CN ix?
glossopharyngeal
what is the name of CN x?
vagus
what is the name of CN xi?
spinal accessory
what is the name of CN xii?
hypoglossal
which nerve is the only one capable of regenerating?
olfactory
what is the function of the olfactory nerve (CNi)?
conveys special sensory information related to smell
name the specialized epithelial tissue inside the nasal cavity that is involved in smell?
olfactory epithelium
which type of sensory information does the olfactory nerve carry?
special sensory
which type of sensory information does the optic nerve carry?
special sensory
where are nerve cell bodies of the optic nerve found found?
retina
what is the function of the retina?
transmits impulses to the brain from the retina at the back of the eye.
which types of motor impulses does the oculomotor nerve carry?
somatic motor and visceral motor
what is the function of the oculomotor nerve (CN iii)
innervates extrinsic eye muscles that enable most movements of the eye and that raise the eyelid.
which cranial nerves work together to supply the eye muscles?
- oculomotor (CN iii)
- trochlear (CN iv)
- abducens (CN vi)
where do the cell bodies of the cranial nerves that supply the eye muscles arise from?
midbrain
if a patient shows inability to move their eye down and out on 1 side this may indicate problems with which cranial nerve?
oculomotor
which type of motor impulses does the trochlear nerve carry?
somatic motor
the trochlear nerve innervates a single muscle, what is the name of this muscle?
superior oblique
which muscles does the oculomotor nerve innervate?
- superior rectus
- medial rectus
- inferior oblique
- levator palpebrae superioris
if the patient can’t look down it is likely they have a problem with which cranial nerve?
trochlear
name the first branch of the trigeminal nerve (CN V1)
ophthalmic
name the second branch of the trigeminal nerve (CN V2)
maxillary
name the third branch of the trigeminal nerve (CN V3)
mandibular
which type of sensory function do all 3 branches of the trigeminal nerve have?
special sensory
the ophthalmic branch of the trigeminal nerve provides sensation from which areas?
cornea, skin of forehead, scalp, eyelids, nose, mucosa of nasal cavities, paranasal sinuses
the maxillary branch of the trigeminal nerve provides sensation from which areas?
face over maxilla, upper lip, maxillary teeth, maxillary sinuses
the mandibular branch of the trigeminal nerve provides sensation from which areas?
side of mandible, mandibular teeth, mucosa of mouth, anterior 2/3 of tongue
the superior alveolar nerve branches of what cranial nerve?
maxillary branch of the trigmenal
the inferior alveolar nerve branches of what cranial nerve?
mandibular branch of trigeminal
how would you asses the integrity all 3 branches of the trigeminal nerve?
touch 6 places
which type of motor supply does the abducens nerve supply?
somatic motor
what is the function of the trigeminal nerve (CN v)
sensation in the face and motor functions such as biting and chewing
what is the function the abducens nerve?
supply motor function to lateral rectus
where does the abducens nerve arise?
pons
what does LR6 SO4 mean?
- Lateral Rectus 6
- Superior Oblique 4
- all other eye muscles supplied by CN 3
what is the nemonic to remember which cranial nerves supply which eye muscles?
LR6 SO4
the facial nerve supplies brachial motor supply to where?
- muscles of facial expression
- scalp
- stapedius (small ear muscle)
the facial nerve supplies special sensory supply to where?
- anterior 2/3 tongue
- palate
the facial nerve supplies visceral motor supply to where?
- P/S to submandibular and sublingual glands
- lacrimal gland
- glands of nose
- glands of palate
how would you test the integrity of the facial nerve (CN vii)
puff cheeks and raise eyebrows
which nerve passes though the parotid gland yet does not supply it?
facial
which nerve supplies the parotid gland?
glossopharyngeal
which type of sensory functions does the vestibulocochlear nerve provide?
special sensory
what is the function of the vestibulocochlear nerve (CN viii)?
hearing from spinal organ
what types of sensory innervations does the glossopharyngeal nerve provide?
- visceral sensory
- special sensory
- somatic sensory
what types of motor supply does the glossopharyngeal nerve provide?
- somatic motor
- visceral motor
where does the glossopharyngeal nerve (CN ix) provide motor function to?
- parotid gland (P/S)
- stylopharyngeus
where does the glossopharyngeal nerve (CN ix) provide sensory function to?
- parotid gland
- pharynx
- middle ear
- posterior 1/3 tongue
- external ear
which nerve is known as the wandering nerve?
vagus (CN x)
what types of motor functions does the vagus nerve provide?
- somatic motor
- visceral motor
vagus nerve provide?
- visceral sensory
- special sensory
- general sensory
what is the function of the vagus nerve (CN X)?
connect the brain to the body
what type of motor supply does the spinal accessory nerve provide?
somatic motor
what is the fucntion of the spinal accessory nerve (CN xi)?
motor supply to sternocleidomastoid and trapezius
what type of motor supply does the hypoglossal nerve provide?
somatic motor
what is the fucntion of the hypoglossal nerve (CN xii)?
motor and extrinsic muscles of tongue (except palatoglossal)
