Abstract

A clinical test for the diagnosis of ptosis in myasthenia is described. The effects of an antiorthostatic (head-down) posture on the degree of ptosis in myasthenia, von Graefe myopathy, oculomotor nerve lesions, and pseudoptosis were studied. The antiorthostatic posture significantly (p < 0.05) decreased the severity of ptosis only in patients with myasthenia. The degree of ptosis in the antiorthostatic position showed virtually no change in von Graefe myopathy, oculomotor nerve lesions, or pseudoptosis.

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