Stereotactic Surgery in the Rhesus Monkey (Macaca mulatta) Utilizing Intracerebral Landmarks

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Abstract
A stereotactic method utilizing an intracerebral coordinate system and ventricular radiography was developed and applied in rhesus monkeys. The intercommissural line (CA-CP) and two perpendiculars to this line served as the main references for the coordinate system. Surgical placements with the use of this technique were made in various deep cerebral and cerebellar nuclei in 12 Macaca mulatta and the accuracy of the surgery was evaluated histologically. In 11 of the 12 monkeys, the intended targets were achieved precisely. The advantages and pitfalls of the proposed method are discussed.