Table 3.
Descriptions of the amount, usability, and reasons for excluding trials during the MGS task used with the study samplea
| Group | Trials | Usable trials (%) | No MGS (%) | No left MGS (%) | No right MGS (%) | Broke fixation (%) | Broke fixation left (%) | Broke fixation right (%) |
|---|---|---|---|---|---|---|---|---|
| CTL 1 | 270 | 78 | 0 | 0 | 0 | 22 | 14 | 8 |
| CTL 2 | 300 | 87 | 7 | 4 | 3 | 6 | 4 | 2 |
| CTL 3 | 300 | 91 | 4 | 2 | 2 | 5 | 3 | 2 |
| CTL 4 | 300 | 86 | 3 | 2 | 1 | 11 | 5 | 6 |
| CTL 5 | 210 | 91 | 4 | 3 | 1 | 5 | 0 | 5 |
| CTL 6 | 120 | 99 | 0 | 0 | 0 | 1 | 1 | 0 |
| CTL 7 | 300 | 95 | 3 | 2 | 1 | 2 | 2 | 0 |
| CTL 8 | 300 | 55 | 14 | 7 | 7 | 31 | 15 | 16 |
| CTL 9 | 300 | 92 | 4 | 2 | 2 | 4 | 2 | 2 |
| dlPFC 1 | 300 | 97 | 1 | 1 | 0 | 2 | 1 | 1 |
| dlPFC 2 | 240 | 62 | 14 | 8 | 6 | 25 | 11 | 14 |
| dlPFC 3 | 240 | 88 | 1 | 0 | 1 | 11 | 7 | 4 |
| dlPFC 4 | 300 | 82 | 1 | 1 | 0 | 17 | 10 | 7 |
| dlPFC 5 | 300 | 81 | 6 | 3 | 3 | 13 | 7 | 6 |
| dlPFC 6b | 300 | 0 | 100 | 56 | 44 | 100 | 56 | 44 |
| dlPFC 7b | 300 | 0 | 78 | 41 | 37 | 100 | 52 | 48 |
| dlPFC 8b | 150 | 28 | 48 | 22 | 26 | 50 | 26 | 24 |
| dlPFC 9b | 300 | 0 | 97 | 52 | 45 | 100 | 55 | 45 |
| PCS 1 | 300 | 54 | 8 | 5 | 3 | 37 | 18 | 19 |
| PCS 2 | 300 | 58 | 1 | 1 | 0 | 41 | 26 | 14 |
| PCS 3 | 300 | 62 | 24 | 13 | 11 | 17 | 7 | 10 |
adlPFC, dlPFC resection sparing the PCS; PCS, prefrontal cortex resection impacting the PCS; No MGS, percentage of trials in which the subject did not generate an MGS before the feedback was presented; No left/right MGS, same broken down by whether the cue was in the left or right visual field; Broke fixation, looked away from the fixation point (almost always towards the location of the visual cue) during the cue or delay period; Broke fixation left/right, same broken down by whether the cue was in the left or right visual field.
bExcluded because of failure to maintain central fixation when the memory cue appeared in the periphery for a minimum of 50 trials.