The article presents the results of a comprehensive neuropsychological examination of patients with myasthenia gravis, which revealed intellectual-mnestic disorders in 36.6% of cases: disturbances in memorization processes, a decrease in short-term memory, faster exhaustion of attention. The disease can manifest at any age, in many cases leads to disability and disability, and therefore remains an urgent problem with many unresolved questions regarding not only the etiology and pathogenesis, but also the clinical picture of the disease.