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Lecture 4

Lecture 4 - Oh Oh Oh To Touch And Feel Very Good Velvet AH...

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Unformatted text preview: Oh Oh Oh To Touch And Feel Very Good Velvet AH Olfactory I Optic II Oculomotor III Trochlear IV Trigeminal V Abducens VI Facial VII Vestibulochochlear VIII Glossopharyngeal IX Vagus X Accessory XI Hypoglossal XII Old Opie Occasionally Tries Trigonometry And Feels Very Gloomy, Vague, And Hypoactive Nervous System Review Cranial nerves are part of the Peripheral Nervous System Cranial nerves can carry: Somatic signals: motor and/or sensory Visceral (Autonomic) motor (parasympathetic) and/or sensory CN I: Olfactory Special Sensory neurons: Smell! Cribiform plate is perforated to allow olfactory n. endings to penetrate nasal capsule CN II: Optic Special sensory neurons: sight Origin: retina Terminate: temporal lobe NN pass through optic canal CN III: Occulomotor Mixed nerve: somatic motor and visceral (parasympathetic) motor Gross motor control of the eye (somatic) Pupil sphincter mm and ciliary mm of lens Exit: superior orbital fissure CN IV: Trochlear Somatic motor: superior oblique mm Exits through superior orbital fissure CN V: Trigeminal V1: Opthalmic (S) sup. Orb. Fiss. V2: Maxillary (S) Foramen rotundum V3: Mandibular (S/M) Foramen oval CN VI: Abducens Somatic motor control of lateral rectus mm Exit: superior orbital fissure Mixed nerve Sensory = taste Motor Parasympathetic (rest/digest) motor to salivary and lacrimal glands Internal Auditory meatus & Stylomastoid foramen CN VII: Facial CN VIII: Vestibulocochlear Mixed nerve: PRIMARILY sensory (hearing and equillibrium), also Motor = tuning hearing Passes through Internal acoustic (auditory meatus) CN IX Glossopharyngeal Mixed nerve: Parasympathetic: parotid gland General sensory and special (taste) Motor: pharynx Jugular foramen CN X: Vagus Vagus = Wanderer Mixed Sensory and . . . Somatic motor and . . . Parasympathetic motor Important in controlling: Cardiac Respiratory Digestive Urinary CN XI Accessory Has origins in medulla and spinal cord Exits via jugular foramen Motor control Swallowing SCM Trapezius CN XII: Hypoglossal Motor Tongue (intrinsic and extrinsic mm) Hypoglossal canal Cranial Nerve Summary Sensory only: CN I and II Parasympathetic control: CN III, VII, IX, X Most are mixed (sensory and motor) Sensory and motor functions do not have to be related ...
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