Lecture 8- Summaries of the cranial nerves Flashcards
CN I
olfactory
CN II
optic
CN III
oculomotor
CN IV
trochlear
CN Va
opthalmic branch of trigeminal
CN Vb
maxillary branch of trigeminal
CN Vc
mandibular branch of trigeminal
CN VI
abducens
CN VII
facial
CN VIII
vestibulocochlear
CN IX
glossopharyngeal
CN X
vagus
CN XI
spinal accessory
CN XII
hypoglossal
where does the olfactory nerve (CN I) exit
cribriform plate
where does the optic nerve (CN II) exit
optic canal
where does the oculomotor nerve (CN III) exit
Superior orbital fissure
where does the trochlear nerve (CN IV) exit
Superior orbital fissure
where does the Opthalmic branch trigeminal nerve (CN Va) exit
Superior orbital fissure
where does the maxillary branch trigeminal nerve (CN Vb) exit
foramen rotundum
where does the mandibular branch trigeminal nerve (CN Vc) exit
foramen ovale
where does the trochlear nerve (CN VI) exit
Superior orbital fissure
where does the facial nerve (CN VII) exit
internal acoustic meatus > stylomastoid f.
where does the vestibulocochlear nerve (CN VIII) exit
internal acoustic meatus
where does the glossopharyngeal nerve (CN IX) exit
jugular f.
where does the vagus nerve (CN X) exit
jugular f.
where does the spinal accessory (CN X) exit
jugular f.
where does the hypoglossal nerve (CN XII) exit
hypoglossal canal
modality of olfactory (CN I)
sensory SVS (special visceral sensory) - smell
modality of optic (CN II)
sensory SSS (special somatic sensory) - vision
modality of oculomotor (CN III)
Motor
(GSM & GVM)
- general somatic motor (skeletal muscles)
–> 4 extrinsic eye muscles and levator palpebrae superioris.
- general visceral motor (muscles derived from pharyngeal arches)
- –>pupillary sphincter
modality of trochlear (CN IV)
motor (GSM)
- general somatic motor
- superior oblique is a pulley-like structure in the eye.
modality of opthalmic branch of the trigmeninal (CN Va)
GSS (general sensation from skin)
- general somatic sensory
- Scalp, forehead and nose
modality of maxillary branch of the trigmeninal (CN Vb)
GSS
- cheeks, lower eye lid, nasal mucosa, upper lid, upper teeth and palate
modality of mandibular branch of the trigmeninal (CN Vc)
GSS
- anteiror 2/3 of tongue, skin over mandible and lower teeth
SVM (special visceral motor)
- muscles of mastication
modality of abducens (CN VI)
motor GSM
- lateral rectus (The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit.)
modality of Facial (CN VII)
GSS
SVS
SVM
GVM
GSS of the facial nerve
sensation to part of ext. ear.
SVS: taste from ant. 2/3 tongue, hard and soft palate.
SVS of the facial nerve
taste from ant. 2/3 tongue, hard and soft palate.
SVM of the facial nerve
muscles of facial expression.
GVM of the facial nerve
lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose.
modality of Vestibulocochlear (CN VIII)
sensory SSS
- Hearing and balance
modality of the glossopharyngeal (CNIX)
Both:
GSS
GVS
SVS
GVM
SVM
GSS of the glossopharyngeal nerve
post. 1/3 tongue, ext. ear, and middle ear cavity.
GVS of the glossopharyngeal nerve
carotid body and sinus.
SVS of the glossopharyngeal nerve
taste from post. 1/3 tongue.
GVM of the glossopharyngeal nerve
parotid gland.
SVM of the glossopharyngeal nerve
stylopharyngeus
modality of Vagus (CN X)
Both:
GSS
GVS
SVS
GVM
SVM
GSS of the vagus nerve
ext. ear, larynx and pharynx.
GVS of the vagus nerve
larynx, pharynx and, thoracic & abdominal viscera.
SVS of the vagus nerve
taste from epiglottis region of tongue
GVM of the vagus nerve
smooth muscles of pharynx, larynx and most of the GIT.
SVM of the vagus nerve
most muscles of pharynx and larynx.
modality of spinal accessory (CN XI)
Motor
(GSM & SVM)
GSM: trapezius and sternocleidomastoid.
SVM: a few fibres run with CNX to viscera.
modality of Hypoglossal (CN XII)
Motor
(GSM)
Intrinsic and extrinsic tongue muscles (except the palatoglossus).
