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Cranial Nerve I
- Name: Olfactory
- Component: Sensory
- Cranial Exit: Formamina in Cirbriform plate of Ethmoid bone
- Action: Smell from nasal mucosa of roof of each nasal cavity and superior sides of the nasal septum and superior concha
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Cranial Nerve II
- Name: Optic
- Component: Sensory
- Cranial Exit: Optic canal
- Action: Vision from retina
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Cranial Nerve III
- Name: Oculomotor
- Component: Motor
- Cranial Exit: Superior Orbital fissue
- Action: Somatic motor to superior/inferior/medial rectus, inferior oblique, and levator palpebrae superioris muscles. Rises superior eyelid, turns eye. Visceral motor parasympathetic innervation to the sphincter of pupil and ciliary muscle; constricts pupil and accommodates lens of eye.
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Cranial Nerve IV
- Name: Trochlear
- Component: Motor
- Cranial Exit: Superior Orbital fissure
- Action: Motor to superior oblique to assist in turning the eye inferolaterally.
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Cranial Nerve V
- Name: Trigminal; branches into ophthalmic (V1), maxillary (V2), and Mandibular (V3).
- Component: Sensory (V3 is both sensory and motor)
- Cranial Exit: V1:Superior Orbital fissue, V2: Foramen rotundum, V3: Foramen Ovale
- Action: V1: sensation of cornea, skill of forehead, scalp, eyelids, nose and mucosa of nasal cavity and paranasal sinus. V2: Sensation from skin of face over maxilla, including upper lip, maxillary teeth, mucosa of nose, maxillary sinuses and palate. V3: Sensory, sensation from skin over mandible, lower lip, side of head, mandibular teeth, temporomandibular joint, mucosa of mouth, and anteriro 2/3 of tongue. Motor to muscles of mastication, mylohyoid, anteror belly of digastric, tensor veli palatini, and tensory tympani.
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Cranial Nerve VI
- Name: Abducent
- Component: Motor
- Cranial Exit: Superior Orbital fissure
- Action: motor to lateral rectus to turn eye laterally
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Cranial Nerve VII
- Name: Facial
- Component: Sensory and Motor
- Cranial Exit: Internal acoustic meatus, facial canal, stylomastoid foramen
- Action: Sensory: taste from anterior 2/3 of tongue Motor to muscles of facial expression an scalp, stapedius of middle ear, stylohyoid, and posterior belly of digastric. Parasympathetic innervation to submandibular and sublingual salivary glands, lacrimal gland, and glands of nose and palate.
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Cranial Nerver VIII
- Name: Vestibulocochlear
- Component: Sensory
- Cranial Exit: Internal Acoustic meatus
- Action: Vestibular sensation from semicircular ducts, utricle, ans saccule related to position and movement of head. Cochlear hearing from spiral organ.
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Cranial Nerve IX
- Name: Glossopharyngeal
- Component: Sensory and Motor
- Cranial Exit: Jugular Foramen
- Action: Sensory: Visceral sensation from parotid gland, carotid body and sinus, pharynx, and middle ear. Taste from posterior 1/3 of tongue. Cutaneous sensation from external ear. Motor to stylopharyngeus to assit with swallowing. Parasympathetic to parotid gland.
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Cranial Nerve X
- Name: Vagus
- Component: Sensory and Motor
- Cranial Exit: Jugular Foramen
- Action: Sensory: Visceral sensation from base of tongue, pharynx, larynx, trachea, bronchi, heart, esophagus, stomach, and intestine. Taste from epiglottis and palate. Visceral sensation from auricle, external acoustic meatus, and dura mater of posterior cranial fossa. Motor constrictor muscle of pharynx (except stylopharyngeus), intrinstic muscles of larynx, muscles of palate (except tenso veli palatini), and striated muscle in superior 2/3 of esophagus. Parasympatheic innervation to smooth muscle of trachea, bronchi, digestive tract, and cardiac muscle of the heart.
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Cranial Nerve XI
- Name: Accessory
- Component: Motor
- Cranial Exit: Jugular foramen
- Action: Motor to sternocleidomastoid and trapezius
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Cranial Nerve XII
- Name: Hypoglossal
- Component: Motor
- Cranial Exit: Hypoglossal canal
- Action: Motor to intrinsic and extrinsic muscles of tongue (except palatoglossus)
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Which Cranial Nerves have both Sensory and Motor Components?
- V3 / Mandibular
- VII / Facial
- IX / Glossopharyngeal
- X / Vagus
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Which Cranial Nerves are sensory only?
- I-olfactory
- II-optic
- V1, V2 -trigeminal
- VII-vestibulocochlear
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Which cranial nerves are Motor only?
- III- occulomotor
- IV- trochlear
- VI- Abducent
- XI- Accessory
- XII- Hypoglossal
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Which Cranial Nerves have parasympathetic innervation?
- III- occularmotor
- V3- trigeminal
- VII- facial
- IX- glossopharyngeal
- X- vagus
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Cornea Blink Reflex
- Afferent: V1
- Efferent: VII
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Direct light reflex
- Afferent: II
- Efferent: III
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Ciliospinal Reflex
- Afferent: Cervical Spinal
- Efferent: Cervical Sympathetic
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Consentual Reflex
(bilateral constriction)
- Afferent: II
- Efferent: III
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Which nerves supply Greater petrosal?
VII- Facial
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Which nerve supplies Lesser Petrosal?
IX-glossopharyngeal
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Which nerve supplies the Deep cervical?
Cervical Sympathetic
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Which cranial nerve does Herpes zoster to cause loss of eyesight?
V1- opthalmic
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Lacrimation reflex
- Afferent: III
- Efferent: V1 and Parasympathetic of V2
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