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Cyclic esotropia with minimal brain dysfunction

N Gadoth, Z Dickerman, M Lerman

Journal of Pediatric Ophthalmology and Strabismus

|November 1, 1981

Summary

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Cyclic esotropia, an intermittent eye condition, was observed in a child with minimal brain dysfunction. Despite theories linking it to the biological clock, hypothalamic-pituitary function remained normal, suggesting a different origin.

Area of Science:

Ophthalmology
Pediatric Neurology
Endocrinology

Background:

Minimal brain dysfunction (MBD) is associated with various neurodevelopmental challenges.
Cyclic esotropia is a rare form of strabismus characterized by intermittent inward turning of the eye.
The 'biological clock' hypothesis suggests a potential link between circadian rhythm disruptions and certain neurological conditions.

Observation:

An 8-year-old patient with a history of hyperkinesis and learning difficulties, consistent with MBD, presented with alternate-day esotropia.
No other cyclic physiological variations (e.g., sleep, temperature, blood pressure) were noted.
The patient exhibited normal sleep patterns, diurnal variations in physiological parameters, and vital signs.

Findings:

Despite the suspicion of a 'biological clock' impairment, possibly in the hypothalamus, detailed studies of the hypothalamic-hypophyseal axis were conducted.

Related Experiment Videos

All assessments of the hypothalamic-pituitary axis function were within normal limits.

The findings did not support a direct link between cyclic esotropia and hypothalamic-pituitary dysfunction in this case.

Implications:

The study challenges the direct involvement of the hypothalamus in the pathogenesis of cyclic esotropia.
It suggests that if a 'biological clock' mechanism is involved, its neural circuitry may be located outside the hypothalamus.
Further research is needed to elucidate the precise etiology of cyclic esotropia and its potential relationship with circadian regulation.