TheCranialNerves摘要.ppt

The Cranial Nerves Names of cranial nerves Ⅰ Olfactory nerve Ⅱ Optic nerve Ⅲ Oculomotor nerve Ⅳ Trochlear nerve Ⅴ Trigeminal nerve Ⅵ Abducent nerve Ⅶ Facial nerve Ⅷ Vestibulocochlear nerve Ⅸ Glossopharyngeal nerve Ⅹ Vagus nerve Ⅺ Accessory nerve Ⅻ Hypoglossal nerve Fiber components of cranial n. General somatic afferent(sensory) fibers 一般躯体感觉纤维 : transmit exteroceptive and proprioceptive impulses from head and face to somatic sensory nuclei of the brain stem; Special somatic afferent (sensory) fibers 特殊躯体感觉纤维 : transmit sensory impulses from special sense organs of vision, equilibrium and hearing to the brain ; Fiber components of cranial n. General visceral afferent (sensory) fibers 一般内脏感觉纤维 : transmit interoceptive impulses from the viscera to the visceral sensory nuclei-nucleus of solitery tract; Special visceral afferent (sensory) fibers 特殊内脏感觉纤维 : transmit sensory impulses from special sense organs of smell and taste to the brain; Fiber components of cranial n. General somatic afferent (motor) fibers 一般躯体运动纤维 : arises from the General somatic motor nuclei and innervate skeletal muscles of eye and tongue. Special visceral afferent (motor) fibers 特殊内脏运动纤维 : arises from the Special visceral motor nuclei in the brain and to skeletal muscles derived from gill arches (腮弓 ) of embryo：such as the m. of mastication, facial expression and swallowing. Fiber components of cranial n. General visceral afferent (motor) fibers一般内脏运动纤维 : arise from the general visceral motor nuclei and relayed in parasympathetic ganglions,e postganglionic fibers supply cardiac muscles，smooth muscles and glands. Classification of cranial nerves Classification of cranial nerves Classification of cranial nerves Mixed nerves 混合性脑神经: contain both sensory and motor fibers Ⅴ. Trigeminal nerve Ⅶ. Facial nerve Ⅸ. Glossopharyngeal nerve Ⅹ. Vagus nerve Sensory cranial nerves 感觉性脑神经 Olfactory nerve Olfactory cell → Olfactory nerve →