Since 2002, deep brain stimulation (DBS), the surgical implantation of a pacemaker-like device that sends electrical impulses to targeted parts of the brain, has been used as a treatment for motor symptoms of Parkinson’s disease (PD). But are patients trading part of their sense of self in exchange for improved mobility?
In the last decade, a growing number of published articles have raised the concern of personality changes in PD patients as a result of DBS, and tried to discern if the concern is real or overblown. At Thursday’s International Neuroethics Society (INS) meeting discussion “DBS: Continuity of Self,” panelists aimed to add clarity to the debate. “Speculation shouldn’t be divorced from clinical reality,” said panel moderator and ethicist Hannah Maslen, who introduced the session.
The speakers, philosopher and neuroethicist Frederic Gilbert, neuropsychologist Cynthia Kubu, behavioral neurologist Winston Chiong, and ethics researcher Jonathan Pugh, offered a range of perspectives. They largely focused on the state of the evidence and why it’s so difficult to assess personality changes in patients.