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Neuro II - CN V
Thomadaki Fall 2010
Question | Answer |
---|---|
Origin of CN V | - Nucleus of spinal tract of trigeminal [P&T]/ midpons - C5 - Chief sensory nucleus [touch]/midpons - Mesencephalic nucleus [proprioception]/ midpons-midbrane - Motor nucleus [muscles of mastication] |
Branches of CNV | VI - opthalmic V2 - maxillary V3 - mandibular |
V1 (opthalmic) exits the skull via ____ | SOF |
V2 (maxillary) exits the skull via _____ | Foramen Rotundum |
V3 (mandibular) exits the skull via _____ and the meningeal branch of V3 re-enters the skull with the ______ through ________ | Foramen Ovale; middle meningeal artery, foramen spinosum |
Sensory function of CN V | Sensory to face, scalp, teeth, most of tongue, oral & nasal mucosa, dura mater, cerebral blood vessels. |
Sensory fibers coming in from all 3 divisions are _______ cells whose cells bodies are in the _____ or _____ ganglion or ________ (in the case of parasympathetic) | Pseudounipolar; trigeminal, semilunar, mesencephalic |
Motor function of CN V | - Muscles of mastication (masseter, temporalis, medial & lateral pterygoid muscles) - Tensor tympani & tensor veli palatini muscles - Myloyoid & ANTERIOR BELLY of digastric muscle |
Exam for CN V | Touch by cotton swab; pain by pinprick; temp; corneal reflex; jaw reflex; masticatory movements |
Lesion to CN V | Trigeminal neuralgia (tic doulareux), facial anesthesia or numbness, inability or difficulty to bite down |