 Although McKissock approached from the opposite direction, the cut was similar to that of Freeman's transorbital leucotomy, undercutting Brodmann's areas 9 and 10 of the frontal cortex.McKissock was scornful of transorbital operations, considering them an offence "against established aseptic principles".McKissock continued to use the standard prefrontal operation where the aim was to control the behaviour of disturbed patients.