Zenon Mariak is a Polish neurosurgeon, researcher, and professor who is currently head of the Department of Neurosurgery at the Medical University of Białystok.

[4] His research career began in 1978, when he contributed to findings in intracranial pressure, rheoencephalography, and cerebral circulation.

[5][6][7] From 1984 to 1986, his research focused on neurological complications in the field of ophthalmology such as histological changes in the sclera in retinal detachment and cataract extraction.

[12][13] Mariak has explored the revival of psychosurgery, commenting that deep brain stimulation is successful in minimizing negative consequences of neuropsychological disorders.

[14] Mariak is a medical contributor on Polish news network TVP3, most recently discussing epileptic events and visual disturbances.