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Biomedical subjects

N Sradj

Publications and source records attributed to N Sradj.

At least 19 recordsLinked to original sources
PubMed1990

[A new method of surgery of nystagmus blockage syndrome].

Structural surgery is based on a model in which eye movements follow the ball-joint principle, i.e., there is absolute freedom of movement in all possible directions. Nystagmus blockage or convergence excess is regarded as a surplus of the medial rectus muscle. The relation between the weight of the globe and the muscle mass is taken into account. The medial rectus muscle is weakened by splitting it into 3 parts. The central part remains in its physiologic anatomic position in order to preserve normal convergence and binocularity, while the upper and lower portions prevent divergence. Additional prior weakening is accomplished by performing a tenonectomy.

Child↗
PubMed1990

[The measurement theory and the example of the number zero].

For basic research, measurement used in our medical routine doesn't seem to be self-evident. Classical physics claim and demand that everything should be measured with a maximum of exactness in order to avoid errors principly. Results of measurement and diagnosis are often regarded as on and the same thing. For quantum physics, measuring means rather description, approximation, and even perturbation due to manipulation. In strabismology, zero is the starting point of measurement and defines normality. The examination of 70 patients with asthenopia has reveiled that zero-localisation at the Maddox Wing doesn't imply parallelism of the eyes but an esophoria combined with an ocular-cervical syndrome.

Adolescent↗
PubMed1981

[Muscle dynamics in compensatory eye movements (author's transl)].

The theory of compensatory rolling of the eyes when the head is inclined is based on the belief that only the bulb rolls. The authors, on the other hand, advance the hypothesis that level components are also inevitably involved. Therefore, they consider it more correct to speak of compensatory eye movements, especially as such phenomena are also phylogenetically present. On the basis of Volkmann's data (1869), the directions of rotation of the involved muscles are demonstrated and physiologically explained. In this connection if becomes evident that the level divergences observed in pareses of the obliquus superior muscle are already physiologically preprogrammed.

Accommodation, Ocular↗