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[Characteristics of pupil function in patients with dissociated vertical divergence].
- Source :
-
Klinische Monatsblatter fur Augenheilkunde [Klin Monbl Augenheilkd] 2012 Nov; Vol. 229 (11), pp. 1090-6. Date of Electronic Publication: 2012 Nov 21. - Publication Year :
- 2012
-
Abstract
- Dissociated vertical divergence (DVD) is frequently associated with the infantile strabismus syndrome. There are different theories on the pathomechanism of this disorder, but none of them is generally accepted. Some authors believe that the slow upward movement of the covered eye is due to a different illumination of both retinae and consequently an unequal activity of the oculomotor nerve's nuclei. In one hypothesis a predominance of crossing pupillary tract fibres from the pretectal area to motor and parasympathetic nuclei of the oculomotor nerve was supposed. The consequence of this abnormal pathway in the midbrain would be a pronounced contraction anisocoria in patients with DVD. In contraction anisocoria the directly illuminated pupil contracts more strongly than the contralateral pupil without any efferent defect. In a small study we compared direct and indirect pupillary light reflexes in 11 DVD patients and 10 normal subjects. We found no significant differences of contraction anisocoria between the two groups. The results do not support the hypothesis of a different pupillary tract pathway in the midbrain of patients with DVD.<br /> (Georg Thieme Verlag KG Stuttgart · New York.)
- Subjects :
- Anisocoria diagnosis
Anisocoria physiopathology
Exotropia diagnosis
Geniculate Bodies physiopathology
Humans
Mesencephalon physiopathology
Motor Neurons physiology
Nerve Fibers physiology
Optic Chiasm physiopathology
Parasympathetic Nervous System physiopathology
Photic Stimulation
Pupil Disorders diagnosis
Exotropia physiopathology
Oculomotor Nerve physiopathology
Pupil Disorders physiopathology
Reflex, Pupillary physiology
Retina physiopathology
Visual Pathways physiopathology
Subjects
Details
- Language :
- German
- ISSN :
- 1439-3999
- Volume :
- 229
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Klinische Monatsblatter fur Augenheilkunde
- Publication Type :
- Academic Journal
- Accession number :
- 23172621
- Full Text :
- https://doi.org/10.1055/s-0032-1327865