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cranial nerves

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

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cranial nerves

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  1. cranial nerves

  2. 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

  3. Functional components General somatic afferent fibers (GSA): transmit exteroceptive and proprioceptive impulses from head and face to somatic sensory nuclei Special somatic afferent fibers (SSA): transmit sensory impulses from special sense organs of vision, equilibrium and hearing to the brain General visceral afferent fibers (GVA): transmit interoceptive impulses from the viscera to the visceral sensory nuclei Special visceral afferent fibers (SVA): transmit sensory impulses from special sense organs of smell and taste to the brain General somatic efferent fibers (GSE): innervate skeletal muscles of eye and tongue Special visceral efferent fibers (SVE): transmit motor impulses from the brain to skeletal muscles derived from brachial (gill) arches of embryo. These include the muscles of mastication, facial expression and swallowing General visceral efferent fibers (GVE): transmit motor impulses from the general visceral motor nuclei and relayed in parasympathetic ganglions. The postganglionic fibers supply cardiac muscles，smooth muscles and glands

  4. Classification of cranial nerves Sensory cranial nerves: contain only afferent (sensory) fibers ⅠOlfactory nerve ⅡOptic nerve Ⅷ Vestibulocochlear nerve Motor cranial nerves: contain only efferent (motor) fibers Ⅲ Oculomotor nerve Ⅳ Trochlear nerve ⅥAbducent nerve Ⅺ Accessory nerv Ⅻ Hypoglossal nerve Mixed nerves: contain both sensory and motor fibers--- ⅤTrigeminal nerve, Ⅶ Facial nerve, ⅨGlossopharyngeal nerve ⅩVagus nerve

  5. Sensory cranial nerves

  6. Motor cranial nerves

  7. General somatic efferent nuclei • Nucleus of oculomotor n. • Nucleus of trochlear n. • Nucleus of abducent n. • Nucleus of hypoglossal n.

  8. Special visceral motor nuclei • Motor nucleus of trigeminal n. • Nucleus of facial n. • Nucleus ambiguous • Accessory nucleus

  9. Special visceral efferent nuclei

  10. General visceral motor nuclei • Accessory oculomotor nucleus • Superior salivatory nucleus • Inferior salivertory nucleus • Dorsal nucleus of vagus n.

  11. General visceral efferent nuclei

  12. Visceral sensory nuclei ( general and special ) • Nucleus of solitary tract

  13. Visceral sensory nuclei ( general and special )

  14. General somatic afferent nuclei • Mesencephalic nucleus of trigeminal n. • Main sensory nucleus of trigeminal n. • Spinal nucleus of trigeminal n.

  15. General somatic sensory nuclei

  16. Special somatic afferent nuclei • Cochlear nuclei 2 - Dorsal - Ventral • Vestibular nuclei 4 - Superior - Inferior - Medial - Lateral

  17. Special somatic afferent nuclei

  18. Non-cranial nerve nuclei

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