Table 2.
Brain regions involved in object recognition in clutter.
| Table 2A|Learned in strong clutter > Learned in weak clutter (p < 0.05, corrected). | ||||||||
|---|---|---|---|---|---|---|---|---|
| ROI¶ | Hemi-sphere | Brod-mann area | x† | y† | z† | Correlation with performance§ | ||
| Strong clutter | Weak clutter | No target | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Dorsal Precuneus | L&R‡ | BA7/31 | 3 | −75 | 38 | 0.10 | 0.23* | −0.38* |
| Medial Occipital | L&R‡ | BA17/18/19 | 0 | −92 | 28 | −0.23* | 0.05 | −0.50** |
| Caudate Nucleus (CN)/Globus | L&R‡ | (unassigned) | 2 | 0 | 3 | 0.00 | −0.40* | −0.08 |
| Pallidus Internal Segment (GPi) | ||||||||
| Fusiform Gyrus (FG) | L | BA37 | −54 | −51 | −21 | 0.48** | 0.15 | −0.20 |
| Fusiform Gyrus (FG) | R | BA37 | 57 | −57 | −18 | 0.53** | 0.06 | 0.04 |
| Table 2B|Learned in weak clutter > Learned in strong clutter (p < 0.05, corrected). | ||||||||
| ROI¶ | Hemi-sphere | Brod-mann area | x† | y† | z† | Correlation with performance§ | ||
| Strong clutter | Weak clutter | No target | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Dorsomedial Prefrontal (DMPFC) | L&R‡ | BA32 | −15 | 45 | 33 | 0.18 | −0.01 | 0.50** |
| Parahippocampal Cortex (PHC) | L | BA20/BA37 | −30 | −42 | −12 | −0.03 | 0.05 | −0.01 |
| Anterior Insula | L | (unassigned) | −39 | 0 | 6 | −0.31* | 0.25* | −0.28* |
| Parahippocampal Cortex (PHC) | R | BA20/BA37 | 27 | −39 | −15 | −0.12 | 0.02 | 0.24* |
| Precentral | R | BA4/6 | 39 | −3 | 42 | −0.08 | −0.28* | −0.26* |
| Superior Temporal (ST) | R | BA39/BA22 | 48 | −33 | 9 | −0.48** | 0.05 | −0.31* |
| Posterior Insula | R | BA42 | 48 | −48 | 15 | 0.11 | 0.05 | −0.03 |
ROIs highlighted in green, red, or yellow denoted brain regions whose activity correlated with the recognition of objects learned in strong clutter, objects learned in weak clutter, or both types of objects, as determined by logistic regression at the level of stimulus types. The BOLD responses used in the models were estimated using the Condition-wise method (Method 1; Materials and Methods). This analysis was separate from the behavioral level analyses shown in columns 7–9. See text for details.
The stereotactic coordinates represent the center of mass of the given ROI in the MNI space.
ROIs that were contiguous because they were on the medial wall of the hemispheres were treated as a single ROI, i.e., the voxels were not partitioned into two hemispheres.
The numbers represent the correlation coefficient r between the estimated BOLD response of a given ROI to a given condition during each scan and the corresponding behavioral performance of the subject (measured as % correct trials). The BOLD responses during a given condition were estimated using the Condition-wise method (Method 1; Materials and Methods).
p < 0.05 (df = 54);
p < 0.001 (df = 54).