Poster A40, Saturday, March 25, 5:00 – 7:00 pm, Pacific Concourse
Hippocampal Activity Predicts High-resolution Visual Working Memory
Alyssa Borders1, Andrew Yonelinas1; 1University of California, Davis
The hippocampus and medial temporal lobe (MTL) structures are known to play a role in long-term memory, but their role in visual working memory (VWM) function is poorly understood. Recent work has suggested that the hippocampus is involved in working memory tasks that require the binding of high-resolution information. To test this possibility, we used fMRI to assess hippocampal involvement in a VWM task that required memory for high-resolution information and used a test procedure to measure memory precision. In the current study, participants studied an array of colored squares and were asked to maintain the information over a one second delay until one location of the study array was cued. Participants were then asked to report the exact color of the cued location using a continuous color wheel, and accuracy was measured in degrees between the response and the correct color. Preliminary results suggest that hippocampal and perirhinal activity predict successful VWM performance and that hippocampal activity levels predicts VWM precision. This finding supports the prediction that the hippocampus is involved in accurate discriminations in VWM tasks requiring high‐resolution discriminations.
Topic Area: EXECUTIVE PROCESSES: Working memory