Summary: Brief Communications
A Proactive Mechanism for Selective Suppression of
Weidong Cai, Caitlin L. Oldenkamp, and Adam R. Aron
Department of Psychology, University of California, San Diego, La Jolla, California 92093
also calls for a mechanism to prepare to stop a particular response tendency (i.e., proactively and selectively). We hypothesized that
this by using single-pulse transcranial magnetic stimulation and concurrent electromyography. This allowed us to interrogate the
effector that might need to be stopped in the future was significantly reduced compared with when that effector was at rest. Further, this
These results go further than earlier reports of reduced motor excitability when responses are stopped. They show that the control can be
mechanism of suppression in the brain that is setup according to the subject's goals and even before action ensues.
The ability to stop a response is important in everyday life. Much
research has investigated this using experimental paradigms, such as
go/no-go and stop-signal tasks (Verbruggen and Logan, 2009).
However, these paradigms are limited by the fact that stopping is