Posterior parietal cortex activity predicts individual differences in visual short-term memory capacity

摘要: Humans show a severe capacity limit in the number of objects they can store visual short-term memory (VSTM). We recently demonstrated with functional magnetic resonance imaging that VSTM storage estimated averaged group data correlated strongly posterior parietal/superior occipital cortex activity (Todd & Marois, 2004). However, individuals varied widely their capacity. Here, we examined neural basis these individual differences. A voxelwise, individualdifferences analysis revealed significant correlation between parietal (PPC) and individuals’ In addition, region-of-interest indicated other brain regions, particularly cortex, may contribute to differences Thus, although not ruling out contributions from individual-differences approach supports key role for PPC by demonstrating its level predicts