Fig. 1
From: Neuronal baseline shifts underlying boundary setting during free recall
Experimental design, stimuli, and electrode locations. a Participants viewed pictures of famous people and places, and after a short distraction task, were instructed to freely recall items from each category at a time. b Example of pictures from the two categories. Participants were instructed to remember the pictures in as much detail as possible, focusing on colors, face expressions, perspective, and so on. Photo of Bill Clinton courtesy of Gage Skidmore; photo of the Golden Gate Bridge courtesy of Nicolas Raymond; photo of the Leaning Tower of Pisa courtesy of Josu. These pictures are all published under a Creative Commons license. Photo of Barack Obama courtesy of the US Government. c Multi-patient electrode coverage. Recording sites in each patient were localized based on post-operative CT and MRI scans; the cortical surface was then reconstructed using FreeSurfer and standardized using SUMA to allow visualization of electrodes from different patients on a single cortical template (see Methods section). Visually responsive electrodes were attributed based on anatomical and functional criteria to one of the following subgroups: V1 (blue); V2 (light blue); category non-selective intermediate visual areas (yellow); face selective (red); and place selective (green). Note the clear tendency of category selective electrodes to be localized in high-order visual areas along the ventral stream. See Supplementary Table 2 for further details. (Abbreviations: RH—right hemisphere; LH—left hemisphere)
