Reasons for exclusion were technical problems during recording (n = 4), too much noise in the EEG signal to produce a reliable ERP waveform (n = 3), and random responding on the task (n = 3).
The bHR rats exhibit enhanced acquisition of cocaine self-administration relative to bLR rats [ 5] as well as increased impulsivity (for example, reduced behavioral inhibition or increased responding on a task requiring inhibition compared with bLR rats) [ 12].
There was a significant main effect of condition [ F (1,82) = 48.0, P < 0.0001] due to higher betting in the Descend condition than the Ascend condition, but the condition interaction terms and 3-way interaction term were non-significant (all F < 1.13), indicating the betting group differences in betting were not due to motor impulsivity or delay-averse responding on the task (Fig. 5D).
In voluntary task-switching paradigms, participants can in principle start to prepare for the upcoming task immediately after responding on the preceding task.
There was a trend for a treatment effect for speed of responding on the Stroop task [ F 3, 143) = 2.62, p = 0.054].
In a separate study, juvenile male rats exposed to either PCB-contaminated fish or Aroclor 1248 concentrations equivalent to those in the fish (Berger et al. 2001) showed increased lever pressing and bursts of responding on an FI task.
They found that BLLs at 2 4 years of age (mean, 4.58 μg/dL) were associated with excessive responding on the DRL task at 9.5 years of age, indicative of impaired response inhibition.
Utilizing a 7% carbon dioxide (CO2) gas to induce anxiety, the present study examined the impact of anxious responding on two performance tasks, mental arithmetic and lexical decision.
Thus, binge ethanol exposure resulted in neurodegeneration of a corticolimbic circuit with common excitatory inputs from the olfactory bulb and was associated with perseverative responding on a spatial learning task.
We previously reported a relationship between prenatal PCB exposure and impulsive (excessive) responding on a continuous performance task in children at 4 1/2 years of age [P.W. Stewart, S. Fitzgerald, J. Reihman, B. Gump, E. Lonky, T. Darvill, J. Pagano, P. Hauser, Prenatal PCB exposure, the corpus callosum, and response inhibition, Environmental Health Perspectives 111 (13 2003b3b) 1670 1677.].
5-HT depletions in either the OFC or the amygdala led to an abolition of suppression of responding on a VI response task, indicative of a decrease in punishment sensitivity and/or a loss of behavioral control.
