Eckel CNV & VII
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| Origin of CN V nuclei | show 🗑
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| show | 1.Sensory: (Big) Major sensory nerve of the face.
2.Motor: (Small) innervates the muscles of mastication, anterior digastric, mylohyoid, tensor veli palatini, tensor tympani
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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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| Branches of the Opthalmic division: Lacrimal N | show 🗑
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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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| show | the lacrimal N. it is a secretomotor communicating branch.
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| Branches of the Maxillary division: Superior Alveolar N | show 🗑
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| Branches of the Maxillary division: Infra-orbital N | show 🗑
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| 4 major nerve branches of Maxillary N (V2) | show 🗑
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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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| show | 1.Auriculotemporal N.
2.Inferior Alveolar N.
3.N. to Mylohyoid.
4.Lingual. (GSA of tongue)
5.Buccal.
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| show | Originates in the infratemporal fossa and pass b/w the lateral pterygoids, emerging anteriorly from the ramus of the mandible and masseter. It connects with the Buccal branch of the facial N.
**Cutaneous nerve for skin and oral mucosa of cheek
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| Auriculotemporal N (Mandibular Branch) | show 🗑
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| show | Enters the Mandible via the Mandibular foramen. serves as the roots of inferior teeth (dentists numb this nerve). Forms the Mental N when it exits the mental foramen (Cutaneous N for chin and lower lip).
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| Parasympathetics associated with CN V | show 🗑
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| show | loss of light touch, pain, and heat sensation. Paralysis of muscles of mastication (**chin will point to side of lesion). Loss of afferent limb of corneal reflex (both eyes blink).
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| Trigeminal Neuralgia | show 🗑
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| show | Located in the Pons and emerges between the pons and brainstem.
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| show | Ganglion of CN VII Facial N where the motor and sensory roots merge.
**Equivalent to the posterior root ganglion.
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| show | Major part of CN VII. Innervate:
1.Muscles of Facial expression.
2.Posterior Digastric.
3.Stapedius (ear).
4.Stylohoid (pharynx).
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| Pathway of CN VII to exit the skull | show 🗑
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| show | 1.Greater Petrosal N.
2.Chondra tympani N.
3.N. to Stapedius M.
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| Chondra Tympani N. | show 🗑
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| show | Carries Pre (GVE) and postgang.(GVA) parasymp fibers to submandibular glad. Also carries Postgang. (GVA) parasymp. fibers to sublingual gland.
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| Greater Petrosal N. | show 🗑
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| Postganglionic parasympathetic targets of Pterygopalatine ganglion | show 🗑
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| branch of the Facial N (CN VII) that comes after immediately after the stylomastoid foramen? | show 🗑
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| show | 1.Temporal.
2.Zygomatic.
3.Buccal.
4.Mandibular.
5.Cervical.
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| show | NOOOO, glossopharyngeal (IX)
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| Bell's Palsy | show 🗑
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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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| show | There is a lesion on the Trigeminal N. and the sensory arm of the reflex is damaged.
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