Learning Shapes the Representation of Visual Categories in the Aging Human Brain

■ The ability to make categorical decisions and interpret sensory experiences is critical for survival and interactions across the lifespan. However, little is known about the human brain mechanisms that mediate the learning and representation of visual categories in aging. Here we combine behavioral measurements and fMRI measurements to investigate the neural processes that mediate flexible category learning in the aging human brain. Our findings show that training changes the decision criterion (i.e., categorical boundary) that young and older observers use for making categorical judgments. Comparing the behavioral choices of human observers with those of a pattern classifier on the basis of multivoxel fMRI signals, we demonstrate learning-dependent changes in similar cortical areas for young and older adults. In particular, we show that neural signals in occipito-temporal and posterior parietal regions change through learning to reflect the perceived visual categories. Informatio...

• Type: Journal
• Year: 2010
• Where: JOCN
• Authors: Stephen D. Mayhew, Sheng Li, Joshua K. Storrar, Kamen A. Tsvetanov, Zoe Kourtzi
• Keywords: Flexible Category, Human Brain, JOCN 2010, Visual Categories