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54 Cards in this Set
- Front
- Back
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Olfactory bulb sits on
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cribiform plate
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Location of Olfactory nerve in the nasal cavity
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superior aspect of nasal mucosa on septal wall and lateral wall
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Tumor in hypophysis will impinge on what nerve
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optic nerve causing visual defecit
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Place where the optic nerve comes out
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optic disc
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the optic nerve is covered by..
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the meninges
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third order neurons
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come from ganglion cells
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Oculomotor nerve exit
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Superior orbital fissure
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Oculomotor innervates
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4/6 Extraocular muscles
Medial Rectus Inferior rectus Superios rectus inferior oblique Levator Palpebre Superioris (elevation of upper lid) |
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Oculomotor travels with
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Abducens and V1
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Parasympathetic component of the oculomotor innervates
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Post-ganglionic parasympathetic via short ciliary fibers
Ciliary Ganglion Ciliary Muscle Pupillary constrictor mm. |
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Lesion of Oculomotor
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Ipsilateral eye deviates laterally
-causes diplopia Vertical movements are paralyzed Ptosis Loss of pupillar light reflex |
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Loss of sympathetic innervation to the eyelid
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secondary ptosis
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Exit of the Trochlear nerve
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Superior orbital fissure
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Troclear nerve innervation
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Superior oblique
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Trochlear nerve function
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moves eye down and out
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Does the trochlear nerve run through the common tendinous ring?
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NO
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Exit of V1
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Superior orbital fissure
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V1 innervation
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SENSORY innervation
cornea and eyelids forehead and scalp nose, nasal mucosa paranasal sinuses |
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Exit of V2
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Superior orbital fissure
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Cutaneous branches of V2
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Auriculotemporal n.
Lacrimal Supratrochlear Supraorbital Infraorbital Buccal Mental n |
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sensory innervation to the lacrimal area
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V1
acutal tear production is from facial nerve |
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V2 exit
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foramen rotundum
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Maxillary V2 branch innervations
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skin over maxilla and upper lip
nose maxillary teeth and sinus palate |
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Maxillary V2 communicates with which ganglion
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ptergypalantine ganglion
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Exit of V3- Mandibular
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Foramen ovale
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Differentiating feature of the Mandibular division of V3
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Only motor trigeminal branch
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V3 Mandibular division innervation
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skin over mandible and lower lip
mandibular teeth TMJ mucosa of mouth anterior 2/3 of tongue |
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V3 runs with which artery
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Superficial temporal
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Branches of V3
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Buccal- only sensory
Joins with lingual to give sensory to ant 2/3 of tongue |
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Motor innervation of V3
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Muslces of mastication
Mylohyoid Anterior belly of digastric Tensor Veli pelatini tensor tempani |
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Exit of abducens nerve
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superior orbital fissure
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Innervation of abducens nerve
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lateral rectus m.
abducts eye travels through ring |
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Structures that pass through Common Ring
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Superior oblique
Opthalmic artery V1 Nasociliary nerve Abducens nerve V3 |
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Structures that pass through superior orbital fissure but not the common ring
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Lacrimal nerve
Trochlear nerve Fontal nerve |
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Exit of motor portion of facial nerve
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Internal acoustic meatus and then sylomastoid foramen
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Motor portion of facial nerve innervation
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Facial Expression
Scalp Posterior digastric Sylohyoid Stapedius |
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Exit for taste fibers of facial
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petrotypanic fissure
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Path for Facial taste fibers
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Innervates taste for anterior 2/3 of tongue
Chorda typmany joins with lingual nerve (V3) Cell bodies are in genicular ganglion (posterior bend) |
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parasympathetics of facial nerve to lacrimal
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Greater petrosal nerve to lacrimal gland
Nervus intermedius Innervates Pterygopalatine gangion giving post-ganglionic parasympathetics to the lacrimal gland, nasal mucosa, and hard and soft palate |
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parasympathetics of facial nerve to submandibular and sublingual glands
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Pre-ganglionic Parasympathetics
Nervus intermedius Chorda Tympani Joins Lingual n. (V3) Innervates Submandibular Ganglion Post-ganglionic Parasympathetics Submandibular & Sublingual glands |
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exit of glossophayngeal nerve
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jugular foramen
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motor component of glossopharyngeal nerve
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Innervates stylopharngeus m.
assists with swallowing |
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Parasympathetic glossopharyngeal
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jugular forament to tympanic plexus where it becomes lesser petrosal n. which goes through foramen ovale to synapse at otic ganglion and sends post-ganglionic fibers with auriculotemporal n. V3 to parotid gland
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Glossopharyngeal taste fibers
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posterior 2/3 of tongue
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Visceral sensation of Glossopharyngeal
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Chemoreceptors in carotid body
Pressure receptors in carotid sinus Carotid sinus nerve synapses at inferior glossophyarngeal ganglion Controls BP |
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Glossopharyngeal general sensory
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External ear
Tympanic cavity Mastoid air cells Posterior third of tongue Oropharynx Gag reflex Posterior oral mucosa and middle ear *earache is CN 9 |
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Vagus nerve exit
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jugular foramen
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Vagus innervation
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Motor to Pharynx and Larynx
Parasympathetics – thoracic and abdominal viscera Taste - epiglottis Visceral afferent – inferior pharynx, larynx and thoracic and abdominal viscera General sensation – laryngopharynx and upper GI |
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Vagus motor innervation
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Pharyngeal constrictors
Laryngeal mm Palate mm. except TVP Esophagus Swallowing and phonation |
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Spinal accessory enterance and exit
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Enter: Foramen magnum
Exit: Jugular foramen |
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Branches of vagus
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gives branches from brain stem and cervical spinal cord
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Hypoglossal nerve exit
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Hypoglossal canal
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Hypoglossal innervates
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Extrinsic tongue muscles except Palatoglossus (CNX)
Intrinsic tongue muscles |
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CN XII Palsy
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tongue deviates to the paralyzed side
paralysis of genioglossal mm. |
