Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6032331 | NeuroImage | 2012 | 8 Pages |
Abstract
Response inhibition as measured during a stop-signal task refers to the ability to halt an action that has already been set in motion. Cortical and sub-cortical structures, such as the subthalamic nucleus (STN), that are active during attempts to inhibit action are thought to contribute to a 'stop-process' that must gain dominance over a 'go-process' if inhibition is to be successful. We recorded local field potential activity from the STN of Parkinson's disease patients with implanted deep brain stimulation electrodes during a stop-signal task. In particular we measured activity in the STN that has traditionally been associated with motor action (gamma-band, 60-100Â Hz) and inhibition (beta-band, 10-30Â Hz). Our data support the idea that beta activity in the STN is related to the inhibition of motor action. Further, we report that gamma oscillatory activity responds robustly to stop-signals as well as go-signals. This unexpected finding might suggest that gamma activity supports a go-process that not only responds to go-signals, but is also sensitive to stimuli that signal stopping.
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Authors
Nicola J. Ray, John-Stuart Brittain, Peter Holland, Raed A. Joundi, John F. Stein, Tipu Z. Aziz, Ned Jenkinson,