Example neurons from each subject.

<p>Each graph plots spikes per second as a function of time in milliseconds and each line represents the average spike rate of the neuron when the subject was presented with one of three rewards. (A) For this particularly neuron the firing rates following stimulus presentation are statistically different (ANOVA, F(2,652) = 3.63, p = 0.0271), while the firing rates following the receipt of reward are not statistically different (ANOVA, F(2,652) = 1.67, p = 0.1889). (B) The example neuron for Subject 2 has statistically different responses to the presentation of the reward stimuli (ANOVA, F(2,551) = 4.11, p = 0.017) and the neurons responds statistically differently to the rewards (ANOVA, (2,551) = 10.96, p<0.001.