Surgical interruption of part of the sympathetic pathways to relieve chronic pain or to promote vasodilation is

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Sympathectomy is the surgical interruption of part of the sympathetic pathways. It can be done to relieve chronic pain or to promote vasodilation in conditions such as Raynaud's disease. Vagotomy is the surgical cutting of the vagus nerve to reduce acid secretion in the stomach. Phrenemphraxis and ventriculoperitoneostomy are not valid medical procedures.

Surgical Interruption of Part of the Sympathetic Pathways to Relieve