Established in 2008 through commitments made by Agnes Walker, Dr. and Mrs. Irving Sherman, Mr. and Mr. Peter Jennison, Mr. and Mrs. Philip Jennison, Mr. and Mrs. H. Leland Murphy, and an anonymous couple in memory of Dr. A. Earl Walker

A. EARL WALKER, MD, earned his medical degree in 1930 from the University of Alberta, completed his internship at Toronto Western Hospital and his residency in neurology/neurosurgery at the University of Chicago. One year after moving to the University of Iowa in 1934 to become an instructor in neurological surgery, he was selected as a Rockefeller Fellow and studied at Yale University, Amsterdam, and Brussels.

Dr. Walker returned to the University of Chicago in 1937 as an instructor in neurological surgery and was promoted to professor during his ten-year stay. From 1945-1946, he was appointed as a major in the Medical Corps of the United States Army and held the position of chief of neurological section at Cushing General Hospital in Massachusetts.

Dr. Walker came to Johns Hopkins in 1947 where he was both neurological surgeon-in-charge and professor of neurological surgery. He established the first neurosurgery residency program and emphasized research training during residency. It was his vision of the academic neurosurgeon as a researcher that kept neurosurgery within the National Institutes of Health (NIH) programs. Dr. Walker remained at Johns Hopkins until 1972 when he moved to the University of New Mexico as a research and teaching professor in the departments of neurology and surgery.

Dr. Walker's contributions in research, teaching, and patient care had a tremendous influence on the field of neurosurgery.


FREDERICK ARTHUR LENZ, MD, PhD, the A. Earl Walker, M.D. Professor of Functional Neurosurgery, was born 1951 and raised near Toronto, Canada. He attended the University of Toronto where he earned a BSc in chemistry and physics and a PhD in neurophysiology, as well as his medical degree. Dr. Lenz also completed his residency in neurosurgery and a fellowship in functional neurosurgery at the University of Toronto. In 1988, he was appointed assistant professor at Johns Hopkins University and was promoted to professor ten years later. Dr. Lenz is currently professor of neurosurgery and director of epilepsy surgery.

The interests of Dr. Lenz's laboratory are in the neuronal processes, pathways, and functional connectivity underlying human processes including pain, abnormal movements and plasticity. In addition to his research, Dr. Lenz focuses on the surgical treatment of brain disorders where there is an abnormality of function without an anatomical abnormality like a brain tumor. Through his work, he has refined the electrical monitoring techniques used in functional neurosurgery and has discovered much about the electrical signals that the brain makes during both normal function and disease. These findings have enabled Dr. Lenz to develop novel surgical techniques to address diseases where electrical activity of the brain is known to be abnormal, such as with epilepsy or tremors.