Deep brain stimulation (DBS) has been shown to be a safe and effective method for the treatment of
refractory Parkinson’s disease and other movement disorders. Traditionally, frame-based stereotactic have
been the standard technique commonly used for DBS surgery. With the development of image-guided
neurosurgical systems, frameless stereotactic has been increasingly used for tumor resection or biopsy without
the use of stereotactic frame. Frameless stereotactic for functional surgery has been recently developed with
the accuracy comparable to frame-based stereotactic surgery. The authors report the surgical technique of
frameless functional stereotactic for the treatment of movement disorders.

Keywords: Frameless stereotactic, Functional neurosurgery, Deep brain stimulation, Parkinson’s disease,
Dystonia