Eckel CNV & VII
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| show | Nuclei are located in the pons and they emerge from the pons LATERALLY
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| Two emerging roots of CNV | show 🗑
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| show | 1. Opthalmic (Exits thru Sup. Orbital Fissure).
2.Maxillary (Exits thru foramen rotundum).
3.Mandibular (Exits thru foramen ovale).
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| Where is the Trigeminal ganglion located | show 🗑
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| Branches of the Opthalmic division: Frontal N | show 🗑
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| show | Smallest of the branches. Runs superolaterally through the orbit. Recieves secretomotor fibers from zygomaticotemporal N which act on the lacrimal gland. It is sensory for the area of skin of lateral superior eyelid.
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| show | Deep in the orbit. Gives rise to:
1.Infratrochlear: passes infeior to trochlea on medial wall to innervate skin lateral to root of nose/ medial eyelids.
2.External Nasal: Emerges from nasal cavity to innervate the dorsum,ala,vestibule, apex of nose
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| show | formed in the ptergyopalatine fossa. Forms:
1.Zygomaticofacial: goes thru zyg.fac. canal to inferiolat orbit to innv. the cheek.
2.Zyo.temporal: passes thru the zygo.temp. canal in temp bone to temporal fossa. Innv. hairless skin of ant. temp. fossa.
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| Zygomaticotemporal also give off a branch to: | show 🗑
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| show | Gives off a Ant, middle, and post superior alveolar branch that for the root of the upper teeth as well as innervates the palate.
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| Branches of the Maxillary division: Infra-orbital N | show 🗑
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| show | 1.Infra-orbital N.
2.Zygomatic N.
3.Superior Alveolar N.
4.Palatine N (Greater and lesser)
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| show | Contains BOTH sensory and motor fibers.
Innervates:
1.Muscles of mastication.
2.Tensor tympani.
3.Tensor veli palatini.
4.Anterior Digastric.
5.Mylohyoid.
6. Skin over chin, lower lip, mandible, and ear.
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| Major Branches of Mandibular N (V3) | show 🗑
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| Buccal N (Mandibular Branch) | show 🗑
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| Auriculotemporal N (Mandibular Branch) | show 🗑
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| Inferior Alveolar N (Mandibular Branch) | show 🗑
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| Parasympathetics associated with CN V | show 🗑
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| Lesions of CN V | show 🗑
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| Trigeminal Neuralgia | show 🗑
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| Locatoin of CN VII's nucleus | show 🗑
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| Geniculate ganglion | show 🗑
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| CN VII Motor fiber innervate? | show 🗑
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| show | Internal auditory meatus -> Facial canal (within the temporal bone) -> geniculate ganglion -> Stylomastoid foramen
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| show | 1.Greater Petrosal N.
2.Chondra tympani N.
3.N. to Stapedius M.
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| show | branches from CN VII within the facial canal. jumps on the lingual N to the tongue. Sensory taste (SA) for anterior 2/3 of tongue, submandibular gland, sublingual gland (**since the lingual N passes just superior to them)
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| Parasympathetics involved in Chondra Tympani N. | show 🗑
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| show | Carries preganglionic (GVE) parasymp. fibers to pterygopalatine ganglion.
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| Postganglionic parasympathetic targets of Pterygopalatine ganglion | show 🗑
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| show | Posterior Auricular N. (Cutaneous to parietal region).
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| Branches of CN VII that exit from the Parotid gland | show 🗑
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| show | NOOOO, glossopharyngeal (IX)
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| show | most common cause of a lesion near the stylomastoid foramen causing paralysis of the facial expression muscles on THAT side. Can also see decreased glandular secretions.
**Loss of EFFERENT limb of the corneal reflex.
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| show | There is a problem with the Motor reflex arm (Facial N). Confirm by then testing Orbicularis Oculi. If they cant blink one eye at a time, then there is a lesion on the Facial N.
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| Testing the Corneal Reflex: If neither eye blinks? | show 🗑
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