About the Authors

Josh Kahan

joshua.kahan@ucl.ac.uk

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Laura Mancini

Affiliations Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery UCLH NHS Foundation Trust, London, United Kingdom, Neuroradiological Academic Unit – Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, United Kingdom

Maren Urner

Affiliations Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, London, United Kingdom, UCL Institute of Cognitive Neuroscience, University College London, London, United Kingdom

Karl Friston

Affiliation Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, London, United Kingdom

Marwan Hariz

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Etienne Holl

Affiliation Department of Neurosurgery, Medical University of Graz, Graz, Austria

Mark White

Affiliations Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery UCLH NHS Foundation Trust, London, United Kingdom, Neuroradiological Academic Unit – Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, United Kingdom

Diane Ruge

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Marjan Jahanshahi

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Tessel Boertien

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Tarek Yousry

Affiliation Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery UCLH NHS Foundation Trust, London, United Kingdom

John S. Thornton

Affiliations Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery UCLH NHS Foundation Trust, London, United Kingdom, Neuroradiological Academic Unit – Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, United Kingdom

Patricia Limousin

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Ludvic Zrinzo

Affiliations Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom, Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery UCLH NHS Foundation Trust, London, United Kingdom

Tom Foltynie

Affiliation Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

Competing Interests

TF, LZ, MH, and PL report that they have received honoraria from industry for invited talks. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. The authors report that they have no other financial disclosures or conflicts of interest related to the topics addressed in the study.

Author Contributions

Conceived and designed the experiments: TF PL LZ MJ JT TB MH. Performed the experiments: LM JK MW DR JT TF. Analyzed the data: JK MU LM KF. Contributed reagents/materials/analysis tools: MU KF MW TY JT EH. Wrote the paper: JK TF KF.