Fig. 2: Chronic array recordings.
From: Prefrontal cortical plasticity during learning of cognitive tasks
a Schematic diagram of the monkey brain with the approximate location of the recording grid (gray square) indicated relative to prefrontal landmarks: areas 46 and 8, Principal Sulcus (PS) and Arcuate Sulcus (AS). b Position of the electrode array in the right prefrontal cortex of monkey MA is indicated relative to the PS and AS. c Position of the electrode array in the left hemisphere of monkey NI. d Relative numbers of responsive units in each training phase for passive and active tasks. The number of units is shown as a proportion relative to the average unit number of the passive task in the pre-training phase. Data from two subjects, for MA, n = 1341 in the passive task, n = 1150 in the active task; for NI, n = 816 in the passive task, n = 1230 in the active task. Error bars represent SEM. Stars indicate significant effects in 1-way ANOVA: *p < 0.05, ***p < 0.001. Number of sessions for each electrode that showed response to the task, plotted by their location in the array located in monkey MA (e) and NI (f).
