Imaging Findings in Neurogenic Ptosis
Neurogenic ptosis refers to upper eyelid drooping resulting from disrupted innervation of the eyelid retractor muscles. The differential diagnoses of neurogenic ptosis include oculomotor nerve palsy, Horner’s syndrome, and neuromuscular junction disorders. Oculomotor nerve palsy and Horner’s synd...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Society of Radiology
2025-07-01
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| Series: | Journal of the Korean Society of Radiology |
| Subjects: | |
| Online Access: | https://doi.org/10.3348/jksr.2024.0107 |
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| Summary: | Neurogenic ptosis refers to upper eyelid drooping resulting from disrupted innervation of
the eyelid retractor muscles. The differential diagnoses of neurogenic ptosis include oculomotor
nerve palsy, Horner’s syndrome, and neuromuscular junction disorders. Oculomotor
nerve palsy and Horner’s syndrome result from damage to the oculomotor and oculosympathetic
pathways, respectively. The oculomotor nerve pathway has four segments: intraaxial,
subarachnoid, cavernous, and orbital. The oculosympathetic pathway consists of
three orders of neurons extending from the base of the skull to the upper chest. Several
pathologic conditions can affect these neural pathways and cause neurogenic ptosis owing
to the long course of the involved nerves. Therefore, neurogenic ptosis is usually associated
with unique clinical features based on the anatomical location of the pathology. This pictorial
essay provides a deeper understanding of the neural pathways and different diseases
that cause neurogenic ptosis, which can help in determining the location of the pathology. |
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| ISSN: | 2951-0805 |