Original sentence: The first systematic attempts at human psychosurgery occurred from 1935, when the neurosurgeon Egas Moniz teamed up with the surgeon Almeida Lima at the University of Lisbon to perform a series of prefrontal lobotomies — a procedure severing the connection between the prefrontal cortex and the rest of the brain
Edited sentence: The first systematic attempts at human psychosurgery occurred in the 1880's by psychiatrist Gottlieb_Burckhardt and then the more widely known work in 1935, when the neurosurgeon Egas Moniz teamed up with the surgeon Almeida Lima at the University of Lisbon to perform a series of prefrontal lobotomies — a procedure severing the connection between the prefrontal cortex and the rest of the brain