Pinpointing the neural signatures of single-exposure visual recognition memory
| Autor: | Nicole C. Rust, Travis Meyer, Eero P. Simoncelli, Vahid Mehrpour |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Computer science
media_common.quotation_subject Sensory system Stimulus (physiology) Biology 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Memory Modulation (music) Reaction Time Animals Contrast (vision) 0501 psychology and cognitive sciences Visual Cortex 030304 developmental biology media_common Recognition memory Cerebral Cortex Neurons Brain Mapping 0303 health sciences Multidisciplinary Repetition (rhetorical device) 05 social sciences Behavioral pattern Recognition Psychology Biological Sciences Macaca mulatta Temporal Lobe Cortex (botany) Visual recognition Pattern Recognition Visual Neuroscience Photic Stimulation 030217 neurology & neurosurgery |
| Zdroj: | Proc Natl Acad Sci U S A |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | Memories of the images that we have seen are thought to be reflected in the reduction of neural responses in high-level visual areas such as inferotemporal (IT) cortex, a phenomenon known as repetition suppression (RS). We challenged this hypothesis with a task that required rhesus monkeys to report whether images were novel or repeated while ignoring variations in contrast, a stimulus attribute that is also known to modulate the overall IT response. The monkeys’ behavior was largely contrast-invariant, contrary to the predictions of an RS-inspired decoder, which could not distinguish responses to images that are repeated from those of lower contrast. However, the monkeys’ behavioral patterns were well-predicted by a linearly decodable variant in which the total spike count was corrected for contrast modulation. These results suggest that the IT neural activity pattern that best aligns with single-exposure visual recognition memory behavior is not RS but rather “sensory referenced suppression (SRS)”: reductions in IT population response magnitude, corrected for sensory modulation.Significance statementMemories of whether an image has been seen before are reflected in high-level visual cortex as “sensory referenced suppression (SRS)”: reductions in population response magnitude, corrected for sensory modulation. |
| Databáze: | OpenAIRE |
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