The aim of the article was to study functional asymmetry between hemispheres and to find an ability to mirror phenomena in 25 patients with systemic lupus erythematosus (SLE) and 12 patients with multiple sclerosis. Patients with SLE had the following individual profiles of functional asymmetry: right, mainly right, mixed and mainly left. Nobody of them had either symmetric or left profiles. An ability to mirror phenomena (mirror drawing and mirror writing) has been found in 56% of SLE patients with different individual profiles of functional asymmetry. These patients significantly differed from the control group and patients with multiple sclerosis.
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