Neurosurgery , or neurological surgery , is the medical specialty concerned with the prevention, diagnosis, surgical treatment, and rehabilitation of disorders which affect any portion of the nervous system including the brain , spinal cord , peripheral nerves , and cerebrovascular system. In different countries, there are different requirements for an individual to legally practice neurosurgery, and there are varying methods through which they must be educated. In most countries, neurosurgeon training requires a minimum period of seven years after graduating from medical school. In the United States, a neurosurgeon must generally complete four years of undergraduate education, four years of medical school, and seven years of residency PGY Most, but not all, residency programs have some component of basic science or clinical research.
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