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- Sympathetic_root_of_ciliary_ganglion abstract "The sympathetic root of ciliary ganglion is one of three roots of the ciliary ganglion, a tissue mass behind the eye. It contains postganglionic sympathetic fibers whose cell bodies are located in the superior cervical ganglion. Their axons ascend with the internal carotid artery as a plexus of nerves, the carotid plexus. Sympathetic fibers innervating the eye separate from the carotid plexus within the cavernous sinus. They run forward through the superior orbital fissure and merge with the long ciliary nerves (branches of the nasociliary nerve) and the short ciliary nerves (from the ciliary ganglion). Sympathetic fibers in the short ciliary nerves pass through the ciliary ganglion without forming synapses.Preganglionic sympathetic fibers originate from neurons in the intermediolateral column of the thoracic spinal cord, at the level of thoracic spinal nerve 1 (T1) and thoracic spinal nerve 2 (T2). They form synapses in the superior cervical ganglion. The ratio of incoming to outgoing fibers (the “convergence”) in this ganglion is approximately 100:1. Sympathetic motor neurons in the spinal cord are controlled by supranuclear pathways that descend through the brainstem and spinal cord. Interruption of the sympathetic chain at any level (from the brainstem to the ciliary ganglion) will produce pupillary constriction (miosis) and eyelid droop (ptosis) – the classic signs of Horner's syndrome.Sympathetic fibers from the superior cervical ganglion innervate blood vessels (vasoconstriction), sweat glands, and four eye muscles: the dilator pupillae, the superior tarsal muscle, the inferior tarsal muscle and the orbitalis.The dilator pupillae dilates the pupil; its action is antagonistic to the sphincter pupillae. Pupil size is therefore under the dual control of sympathetic and parasympathetic nerves.The superior tarsal muscle elevates the upper eyelid. The levator palpebrae superioris, which is innervated by a branch of the oculomotor nerve, also elevates the upper eyelid. Eyelid elevation is therefore under both voluntary and involuntary control. Interruption of either pathway will result in eyelid droop (ptosis).The other two eye muscles with sympathetic innervation (the inferior tarsal muscle and the orbitalis) are vestigial in humans. They are variable and often incompletely developed.".
- Sympathetic_root_of_ciliary_ganglion dorlandsPrefix "r_02".
- Sympathetic_root_of_ciliary_ganglion dorlandsSuffix "12688108".
- Sympathetic_root_of_ciliary_ganglion thumbnail Ciliary_ganglion_pathways.png?width=300.
- Sympathetic_root_of_ciliary_ganglion wikiPageExternalLink autonomics_05.html.
- Sympathetic_root_of_ciliary_ganglion wikiPageID "16174155".
- Sympathetic_root_of_ciliary_ganglion wikiPageRevisionID "550784454".
- Sympathetic_root_of_ciliary_ganglion caption "Pathways in the Ciliary Ganglion. Green = parasympathetic; Red = sympathetic; Blue = sensory".
- Sympathetic_root_of_ciliary_ganglion dorlandspre "r_02".
- Sympathetic_root_of_ciliary_ganglion dorlandssuf "12688108".
- Sympathetic_root_of_ciliary_ganglion hasPhotoCollection Sympathetic_root_of_ciliary_ganglion.
- Sympathetic_root_of_ciliary_ganglion latin "ramus sympathetica ganglii ciliaris".
- Sympathetic_root_of_ciliary_ganglion name "Sympathetic root of ciliary ganglion".
- Sympathetic_root_of_ciliary_ganglion wordnet_type synset-nerve-noun-1.
- Sympathetic_root_of_ciliary_ganglion subject Category:Nerves_of_the_head_and_neck.
- Sympathetic_root_of_ciliary_ganglion subject Category:Sympathetic_nervous_system.
- Sympathetic_root_of_ciliary_ganglion type AnimalTissue105267548.
- Sympathetic_root_of_ciliary_ganglion type BodyPart105220461.
- Sympathetic_root_of_ciliary_ganglion type CranialNerve105476256.
- Sympathetic_root_of_ciliary_ganglion type CranialNerves.
- Sympathetic_root_of_ciliary_ganglion type FiberBundle105475681.
- Sympathetic_root_of_ciliary_ganglion type Nerve105474346.
- Sympathetic_root_of_ciliary_ganglion type NervousTissue105296775.
- Sympathetic_root_of_ciliary_ganglion type Part109385911.
- Sympathetic_root_of_ciliary_ganglion type PhysicalEntity100001930.
- Sympathetic_root_of_ciliary_ganglion type Thing100002452.
- Sympathetic_root_of_ciliary_ganglion type Tissue105267345.
- Sympathetic_root_of_ciliary_ganglion type AnatomicalStructure.
- Sympathetic_root_of_ciliary_ganglion type Nerve.
- Sympathetic_root_of_ciliary_ganglion type AnimalBodyPart.
- Sympathetic_root_of_ciliary_ganglion type Nerve.
- Sympathetic_root_of_ciliary_ganglion type BiologicalObject.
- Sympathetic_root_of_ciliary_ganglion comment "The sympathetic root of ciliary ganglion is one of three roots of the ciliary ganglion, a tissue mass behind the eye. It contains postganglionic sympathetic fibers whose cell bodies are located in the superior cervical ganglion. Their axons ascend with the internal carotid artery as a plexus of nerves, the carotid plexus. Sympathetic fibers innervating the eye separate from the carotid plexus within the cavernous sinus.".
- Sympathetic_root_of_ciliary_ganglion label "Sympathetic root of ciliary ganglion".
- Sympathetic_root_of_ciliary_ganglion sameAs m.03wbxb5.
- Sympathetic_root_of_ciliary_ganglion sameAs Q7661373.
- Sympathetic_root_of_ciliary_ganglion sameAs Q7661373.
- Sympathetic_root_of_ciliary_ganglion sameAs Sympathetic_root_of_ciliary_ganglion.
- Sympathetic_root_of_ciliary_ganglion wasDerivedFrom Sympathetic_root_of_ciliary_ganglion?oldid=550784454.
- Sympathetic_root_of_ciliary_ganglion depiction Ciliary_ganglion_pathways.png.
- Sympathetic_root_of_ciliary_ganglion isPrimaryTopicOf Sympathetic_root_of_ciliary_ganglion.
- Sympathetic_root_of_ciliary_ganglion name "Sympathetic root of ciliary ganglion".
- Sympathetic_root_of_ciliary_ganglion name "ramus sympathetica ganglii ciliaris".
