Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 114, Issue 5, Pages 1153-1158Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1608159113
Keywords
electrophysiology; single units; scene selectivity; population code
Categories
Funding
- Volkswagen Foundation (Lichtenberg Program)
- German Research Council [DFG MO930/4-1, SFB 1089]
- National Institute of Neurological Disorders and Stroke
- G. Harold and Leila Y. Mathers Foundation
- Gimbel Discovery Fund
- Dana Foundation
- Human Frontiers Science Program
- National Science Foundation Graduate Research Fellowship
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Imaging, electrophysiological, and lesion studies have shown a relationship between the parahippocampal cortex (PHC) and the processing of spatial scenes. Our present knowledge of PHC, however, is restricted to the macroscopic properties and dynamics of bulk tissue; the behavior and selectivity of single parahippocampal neurons remains largely unknown. In this study, we analyzed responses from 630 parahippocampal neurons in 24 neurosurgical patients during visual stimulus presentation. We found a spatially clustered subpopulation of scene-selective units with an associated event-related field potential. These units form a population code that is more distributed for scenes than for other stimulus categories, and less sparse than elsewhere in the medial temporal lobe. Our electrophysiological findings provide insight into how individual units give rise to the population response observed with functional imaging in the parahippocampal place area.
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