| Academic Posts |
| Catholic University, Santiago, Chile (1962-1966), Assistant Professor of Neurology |
| Institute of Neurology, The National Hospital, Queen Square, London; UK (1966-1974), Lecturer in Neuropathology;
Senior Lecturer and Fellow in Clinical Science (Neurology); and Honorary Consultant (Clinical Neurophysiology) |
| Dartmouth College Medical School (1974-1983), Professor of Medicine |
| University of Wisconsin, Madison (1983-1986), Professor of Neurology |
| Neurological Sciences Institute, Portland (1986-to date), Senior Scientist |
| Oregon Health Sciences University (1986-to date), Professor of Neurology |
| Oregon Health Sciences University (1992-to date), , Professor of Neurosurgery |
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