Table 2.

Basal noradrenaline and acetylcholine efflux in the prefrontal cortex of response contingent and response noncontingent subjects, measured over 2 consecutive days on the five-choice task

Contingent subjectsNoncontingent subjectsGroupDayTime
Day 1Day 2Day 1Day 2
NA5.21  ± 0.575.49  ± 0.535.10  ± 0.535.04  ± 0.52F(1,18) = 0.22;p = 0.65F(1,18) = 0.05;p = 0.82F(2,36) = 0.64;p = 0.53
ACh244.9  ± 26.8219.7  ± 29.2256.9  ± 43.3210.1  ± 26.7F(1,18) = 0.01;p = 0.95F(1,18) = 1.64;p = 0.22F(2,36) = 0.28;p = 0.76
  • The data were averaged from the last three samples collected before task onset (expressed as fmol/10 min ± SEM;n = 10). ANOVA results for between (group)- and within (day, time)-subject effects are shown for each neurotransmitter.