[Rolf Hassler: from leucotomy to stereotaxy].

Rolf Hassler is one of the most renowned German specialists in psychiatry, neurology and neuroanatomy. Hassler's career exemplifies medicine as scientific endeavor. Relaying on an expertise in neuroanatomy gained at Oscar and Cecile Vogt's Kaiser Wilhelm Institute, especially regarding the structure of the thalamus, Hassler enabled Freiburg University's neurosurgery clinic the invention of stereotactic "stepped leucotomy" and established thalamotomy internationally in a leading way. While directing the Neuroanatomical/Neurobiological department of the Max Planck Institute for Brain Research from 1959 until 1982, Hassler continued to study the effects of stimulation and targeted subcortical electrocoagulation in the cat brain. The Freiburg trained neurosurgeon Gert Dieckmann helped Hassler to apply the newly gained knowledge for the stereotactic therapy of torticollis, tics and obsessions and compulsions. The use however of thalamotomy also as a surgical therapy for aggressiveness in children, mainly during the late 1960s and early 1970s, is starting to provoke public criticism. Contrary however to the accusation of a medicine shaped by Nazi ideology into a "science without humanity", Hasslers career reveals a problematic intrinsic to medicine: the together of "art of healing and science".