人体解剖学颅神经ppt课件

Cranial nerve Dept. of Anatomy Zhou Hong Ying Key Points of Learning vName vComponents vPassing through vPeripheral distribution vCentral connection vFunction olfactory optic occulomotor trochlear trigeminal abducens facial vestibulocochlear glossophryngeal vagus accessory hypoglossal Cranial nerve Cranial nerve: connect with brainCranial nerve: connect with brain Openings and fissures on base of skull for CN CRANIAL NERVE General somatic motor (GSM) General visceral motor (GVM) Special visceral motor (SVM) General somatic sensory (GSS) Special somatic sensory (SSS) General visceral sensory (GVS) Special visceral sensory (SVS) Every pair of CN has not all of the above components. CRANIAL NERVE Pure sensory CN u olfactory n. u optic n. u vestibulocochlear n. Olfactory nerve CN I Pure sensory (SVS) - smell Olfactory bulb of telencephalon Leaves cranial cavity through foramina in cribriform plate Distributes to mucosa of superior part of lateral and septal walls of nasal cavity. Olfactory nerve CN I optic n.() pure sensory (SSS)- sight Connects with optic chiasma of diancephlon. Leaves cranial cavity through optic canal. Distributes to retina of eyeball optic nerve, chiasma, optic tract vestibulocochlear conveys impulses from inner ear. sense of position terminates in vestibular N, sense of hearing in cochlear N Vestibulocochlear N. v Pure sensory (SSS) v Internal acoustic meatus internal ear v Vestibular nerve is responsible for equilibrium v Cochlear nerve is responsible for hearing Pure motor CN u oculomotor n. u trochlear n. u abducens n. u accessory n. u hypoglossal nerve oculomotor n. trochlear n. abducens n. Oculomotor n.Oculomotor n.(GSM and GVM) l Midbrain lSuperior orbital fissure lSuperior division-superior rectus midbrain ; Superior orbital fissure ; Superior oblique m Abducens N lPure motor (GSM) ; Pons ; Superior orbital fissure lLateral rectus m accessory n. v Two roots v Pure motor v Medulla in submandibular ganglion submandibular medulla; jugular foramen GVS fibers to carotid sinus and body, oropharynx, and posterior 1/3 of tongue SVS fibers receive taste from posterior 1/3 of tongue SVM fibers supply stylopharyngeus GVM fibers synapse in otic ganglion to supply the parotid gland ()glossopharyngeal n.distributes to pharyngeal muscle, parotid salivary gland () distributes to carotid body (chemoreceptors) carotid sinus (baroreceptors ) ()glossopharyngeal n. distributes to tongue general somatic and special taste sensory(posterior third) ()glossopharyngeal n. The vagus nerve in the neck, thorax, and abdomen Mixed; medulla; jugular foramen; carotid sheath , on the side of mediastinum, esophgeal plexus, esophgeal hiatus anterior and posterior vagal trunks Parasympathetic fibers in the vagus nerveParasympathetic fibers in the vagus nerve l Parasympathetic fibers originate from the dorsal motor nucleus of vagus. l They are distributed widely throughout the respiratory,gastrointestinal system and cardiovascular. l l GVM GVM The afferent fibers of vagus n. 1.receptor for general sensation in tympanic membrane, external autitory meatus, and part of the concha of the external ear. 2. receptor for general viscera sensation are distributed widely throughout the mucous membrane of the respiratory,gastrointestinal system and internal layer of the cardiovascular. 3.chemoreceptors are distributed in aortic bodies and baroreptors in the aortic arch GVS, GSS motor fibers in the vagu