Article Figures & Data
Figures
- Figure 1.
Two views of the virtual environment used in this study. Note the tree and mountains that are part of the landscape in one view and the sunset in the other. Another tree and large mountain were present in the virtual environment.
- Figure 2.
The diagrams show the regression analyses between the gray-matter density (hippocampus and caudate nucleus) and the errors made by the entire group of participants while performing the probe trial. The right side of the figure shows the results superimposed onto an anatomical MRI and displayed in the sagittal plane. Gray-matter density in the right hippocampus at the peak (x = 24, y = −13, z = −20; t = 3.55) was correlated with spatial memory strategies (r = 0.56; p < 0.005; top), whereas the density in the head of the caudate nucleus at the peak (x = −14, y = 28, z = 4; t = −4.33) was correlated with response learning strategies (r = −0.63; p < 0.005; bottom). Other than a negative correlation between probe errors and the tail of the caudate nucleus (x = −26, y = −32, z = 3; t = −4.07; correlation coefficient r = 0.56; p < 0.005), no other region of the brain crossed the threshold for significance corrected for multiple comparisons. The color bars illustrate the range of t statistical values.
- Figure 3.
Inverse correlation (r = −0.43; p < 0.05) between gray-matter density in hippocampus (x = 24, y = −13, z = −20) and the head of the caudate nucleus (x = −14, y = 28, z = 4) at the peaks resulting from the first VBM analysis in all 30 participants (Fig. 2).
- Figure 4.
Regions of the brain that covaried with hippocampal gray matter extracted at the coordinates resulting from the first VBM analysis (x = 24, y = −13, z = −20). The coronal section (top left) is displayed at the coordinate y = −14, the sagittal section is displayed at x = 25, and the axial section is displayed at z = −14. A, Amygdala; H, hippocampus; EC, entorhinal cortex; PR, perirhinal cortex; PH, parahippocampal cortex; OF, orbitofrontal cortex. The color bar illustrates the range of t statistical values.
