Named after Johann F. Horner (1831 to 1886), Swiss anatomist
Synonyms: Horner's trias, Horner's complex, Horner's symptom complex, oculopupillary syndrome
The Horner's syndrome is normally caused by the paralysis of the smooth eye ((muscle]]s innervated by the sympathetic system. The main causes are, besides traumas, brain stem infarcts, Pancoast tumors or any other damage of the stellate ganglion.
Horner's syndrome is defined by the three following symptoms:
(other sources considers this as an artifact; due to the existing ptosis, the eyeball only seems to be sunk in)
The diagnostics normally adopted are visual diagnostics as a well as observation after administration of certain drugs (cocaine equivalents), which usually causes a lack of, or alleviated, mydriasis.
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