Fig. 1From: Deep brain stimulation-associated brain tissue imprints: a new in vivo approach to biological research in human Parkinson’s diseaseThe BTI procedure. a The set combines a guide tube and a rigid blunt stylet. The stylet slides through the guide tube and its tip protrudes by 1.5 mm out of the guiding tube. b-c The stylet tip is lowered to the targeted nucleus (here the GPi) and interacts with the brain parenchyma according to (b) the perioperative radiographic control and (c) the pre-operative MRI-defined trajectory. d Scanning electron microscopy of the stylet tip-associated tissue revealed the presence of cell bodies and fibersBack to article page