 | This article needs additional citations for verification. (February 2022) |
| Horner's syndrome | |
|---|---|
| Other names | Bernard-Horner syndrome (BH), oculosympathetic palsy |
 | |
| Left-sided Horner's syndrome | |
| Specialty | Neurology  |
Horner's syndrome, also known as oculosympathetic paresis,[1] is a combination of symptoms that arises when a group of nerves known as the sympathetic trunk is damaged. The signs and symptoms occur on the same side (ipsilateral) as it is a lesion of the sympathetic trunk. It is characterized by miosis (a constricted pupil), partial ptosis (a weak, droopy eyelid), apparent anhidrosis (decreased sweating), with apparent enophthalmos (inset eyeball).[2]
The nerves of the sympathetic trunk arise from the spinal cord in the chest, and from there ascend to the neck and face. The nerves are part of the sympathetic nervous system, a division of the autonomic (or involuntary) nervous system. Once the syndrome has been recognized, medical imaging and response to particular eye drops may be required to identify the location of the problem and the underlying cause.[3]
- ^ "Horner syndrome: MedlinePlus Medical Encyclopedia". medlineplus.gov. Retrieved 2019-05-06.
- ^ Reference, Genetics Home. "Horner syndrome". Genetics Home Reference. Retrieved 2019-05-06.
- ^ Ropper AH, Brown RH (2005). "14: disorders of ocular movement and pupillary function". In Ropper AH, Brown RH (eds.). Adams and Victor's Principles of Neurology (8th ed.). New York: McGraw-Hill Professional. pp. 222–45. ISBN 0-07-141620-X.