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Inhibitory control and error monitoring by human subthalamic neurons
J Bastin1, M Polosan2, D Benis1
11] Fonctions Cérébrales et Neuromodulation, Université Joseph Fourier, Grenoble, France [2] Grenoble Institut des Neurosciences, INSERM, U836, Grenoble, France.
Translational Psychiatry
|September 10, 2014
Summary
The subthalamic nucleus (STN) plays a role in executive functions like inhibitory control and error monitoring. Electrophysiological recordings reveal distinct neuronal populations and beta band activity within the STN during these processes.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neurophysiology
Background:
- The subthalamic nucleus (STN) is known for its role in motor control.
- Its involvement in nonmotor functions, particularly executive control, is less understood and debated.
- Executive functions include inhibitory control and error monitoring, crucial for goal-directed behavior.
Purpose of the Study:
- To investigate if distinct neuronal populations within the STN support different executive control functions.
- To determine if STN oscillations reflect executive control signals.
- To explore the STN's role in integrating motor and cognitive-executive functions.
Main Methods:
- Microelectrode recordings during deep brain stimulation surgery in patients with severe obsessive-compulsive disorder.
- Extracellular neuronal activity recorded from the associative-limbic part of the STN during a stop-signal task.
- Local field potential recordings of STN oscillations post-surgery.
Main Results:
- Identified three distinct neuronal populations: motor response, successful inhibitory control, and error monitoring.
- Observed selective neuronal firing patterns corresponding to these executive functions.
- Found a rapid increase in beta band activity (15-35 Hz) during both successful and failed stopping behaviors.
Conclusions:
- Provides electrophysiological evidence for functionally distinct neuronal populations within the STN.
- Supports the hypothesis that STN oscillations are involved in executive control.
- Suggests the STN integrates motor and cognitive-executive control functions.
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