Effects of tenotomy surgery on congenital nystagmus waveforms in adult patients. Part II. Dynamical systems analysis.
Congenital nystagmus (CN) is an aperiodic oscillatory eye movement disorder of unknown etiology. We examined the effect of horizontal rectus tenotomy with simple re-attachment on the dimensionality of the dynamical mechanism underlying CN. The correlation dimensions (CDs) were calculated from eight patients who had tenotomy surgery. We found no significant differences in the CDs that could be associated with the surgery. The change in dimensionality was less than 5% on average. The results suggest that the tenotomy has no effect, or only a quite small effect, on the underlying mechanism of the CN beats.
Miura
Kenichiro
K
Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bldg 49, Rm 2A50, Bethesda, MD 20892, USA.
Hertle
Richard W
RW
FitzGibbon
Edmond J
EJ
Optican
Lance M
LM
D000328:Adult; D004585:Electrooculography; D005133:Eye Movements; D006801:Humans; D008875:Middle Aged; D020417:Nystagmus, Congenital / Q000503:physiopathology / Q000601:surgery*; D009801:Oculomotor Muscles / Q000503:physiopathology / Q000601:surgery*; D013597:Systems Analysis; D017211:Treatment Failure