Responses at the previously active lever activated the syringe pump motor but did not result in delivery of ethanol, water, or presentation of the response-contingent cues (house light or white noise).
Conversely, secreted binding proteins can block the activity of previously active extracellular factors [ 5].
Responses at the previously active lever were followed by activation of the syringe pump motor and a 5-s presentation of the CS+ (house light) in the S+ condition, or presentation of the CS− (white noise) in the S- condition.
Interestingly, in three out of 28 switchers, we observed a switching mechanism, in which the previously active BES (BES1) was replaced by a duplication of the newly activated BES (7, 13 or 15b).
Several were not previously active in politics.
Referendum campaigns often inspire people who were not previously active in politics to get involved.
Richard Owen, a young conductor previously active primarily in Europe, has been engaged as music director.
Chronic fatigue in a previously active child can be a sign of anxiety.
Mr. Brokaw was previously active in the creation of the National World War II Memorial.
Lastly, Ukip is also clearly attempting to cement strongholds in areas where the party was previously active.
Extinction phase: Mean (± SEM) number of responses at the previously active lever during the 20th and final extinction session.
