Mechanisms Underlying Decision-Making as Revealed by Deep-Brain Stimulation in Patients with Parkinson's Disease.

Herz, Damian M; Little, Simon; Pedrosa, David J; Tinkhauser, Gerd; Cheeran, Binith; Foltynie, Tom; Bogacz, Rafal; Brown, Peter (2018). Mechanisms Underlying Decision-Making as Revealed by Deep-Brain Stimulation in Patients with Parkinson's Disease. Current Biology, 28(8), 1169-1178.e6. Cell Press 10.1016/j.cub.2018.02.057

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To optimally balance opposing demands of speed and accuracy during decision-making, we must flexibly adapt how much evidence we require before making a choice. Such adjustments in decision thresholds have been linked to the subthalamic nucleus (STN), and therapeutic STN deep-brain stimulation (DBS) has been shown to interfere with this function. Here, we performed continuous as well as closed-loop DBS of the STN while Parkinson's disease patients performed a perceptual decision-making task. Closed-loop STN DBS allowed temporally patterned STN stimulation and simultaneous recordings of STN activity. This revealed that DBS only affected patients' ability to adjust decision thresholds if applied in a specific temporally confined time window during deliberation. Only stimulation in that window diminished the normal slowing of response times that occurred on difficult trials when DBS was turned off. Furthermore, DBS eliminated a relative, time-specific increase in STN beta oscillations and compromised its functional relationship with trial-by-trial adjustments in decision thresholds. Together, these results provide causal evidence that the STN is involved in adjusting decision thresholds in distinct, time-limited processing windows during deliberation.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Tinkhauser, Gerd

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0960-9822

Publisher:

Cell Press

Language:

English

Submitter:

Stefanie Hetzenecker

Date Deposited:

24 Apr 2018 13:38

Last Modified:

28 Oct 2019 23:47

Publisher DOI:

10.1016/j.cub.2018.02.057

PubMed ID:

29606416

Uncontrolled Keywords:

Parkinson’s disease beta decision threshold decision-making deep-brain stimulation drift diffusion model subthalamic nucleus

BORIS DOI:

10.7892/boris.114578

URI:

https://boris.unibe.ch/id/eprint/114578

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