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2015 ; 18
(10
): 1501-8
Nephropedia Template TP
Mayse JD
; Nelson GM
; Avila I
; Gallagher M
; Lin SC
Nat Neurosci
2015[Oct]; 18
(10
): 1501-8
PMID26368943
show ga
Cognitive inhibitory control, the ability to rapidly suppress responses
inappropriate for the context, is essential for flexible and adaptive behavior.
Although most studies on inhibitory control have focused on the
fronto-basal-ganglia circuit, we found that rapid behavioral stopping is enabled
by neuronal inhibition in the basal forebrain (BF). In rats performing the stop
signal task, putative noncholinergic BF neurons with phasic bursting responses to
the go signal were nearly completely inhibited by the stop signal. The onset of
BF neuronal inhibition was tightly coupled with and temporally preceded the
latency to stop, the stop signal reaction time. Artificial inhibition of BF
activity in the absence of the stop signal was sufficient to reproduce rapid
behavioral stopping. These results reveal a previously unknown subcortical
mechanism of rapid inhibitory control by the BF, which provides bidirectional
control over the speed of response generation and inhibition.