From Simple English Wikipedia, the free encyclopedia
The optic nerve , also known as cranial nerve II or simply as CN II , is one of twelve cranial nerves but is also considered to be part of the central nervous system . It sends information from the retina (the outermost part of the eye ) to the brain . The brain forms a picture using the information so that you can see things.The retina sees the image upside-down and the optic nerve sends it to the brain so it turns it back into normal. [1]
Terminal (CN 0) Olfactory (CN I) Nucleianterior olfactory nucleus Course Optic (CN II)Nucleilateral geniculate nucleus Course Oculomotor (CN III) Nucleioculomotor nucleus Edinger–Westphal nucleus Branchessuperior parasympathetic root of ciliary ganglion inferior Trochlear (CN IV)Trigeminal (CN V) NucleiPSN spinal trigeminal nucleus MN TMN Course Branchesophthalmic maxillary mandibular Abducens (CN VI) Facial (CN VII)
Near origin Intermediate nerve Geniculate Inside facial canal Greater petrosal Nerve to the stapedius Chorda tympanilingual nerve submandibular ganglion At stylomastoid foramen Posterior auricular Suprahyoid Parotid plexustemporal zygomatic buccal mandibular cervical Nuclei Facial motor nucleus Solitary nucleus Superior salivary nucleus
Vestibulocochlear (CN VIII) Nucleivestibular nuclei cochlear nuclei Cochlear nervestriae medullares lateral lemniscus Vestibular Glossopharyngeal (CN IX)
Before jugular fossa After jugular fossa Tympanictympanic plexus lesser petrosal otic ganglion Stylopharyngeal branch Pharyngeal branches Tonsillar branches Lingual branches Carotid sinus Nuclei Nucleus ambiguus Inferior salivatory nucleus Solitary nucleus
Vagus (CN X)
Before jugular fossa After jugular fossa Meningeal branch Auricular branch Neck Pharyngeal branch Superior laryngeal Recurrent laryngeal Superior cervical cardiac Thorax Inferior cardiac Pulmonary Vagal trunks Abdomen Celiac Renal Hepatic Anterior gastric Posterior gastric Nuclei Nucleus ambiguus Dorsal nucleus of vagus nerve Solitary nucleus
Accessory (CN XI) Nucleinucleus ambiguus spinal accessory nucleus Cranial Spinal Hypoglossal (CN XII)