Top-down facilitation of visual recognition
Harvard University · Massachusetts General Hospital · +1 more institution
Abstract
Cortical analysis related to visual object recognition is traditionally thought to propagate serially along a bottom-up hierarchy of ventral areas. Recent proposals gradually promote the role of top-down processing in recognition, but how such facilitation is triggered remains a puzzle. We tested a specific model, proposing that low spatial frequencies facilitate visual object recognition by initiating top-down processes projected from orbitofrontal to visual cortex. The present study combined magnetoencephalography, which has superior temporal resolution, functional magnetic resonance imaging, and a behavioral task that yields successful recognition with stimulus repetitions. Object recognition elicited…
Citation impact
- FWCI
- 26.24
- Percentile
- 100%
- References
- 58
Authors
11- MBMoshe BarCorresponding
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- KKK. Kassam
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- ASAvniel Singh Ghuman
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- JBJasmine Boshyan
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
- AMAnnette M. Schmid
Harvard University, Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
Topics & keywords
- Magnetoencephalography
- Cognitive neuroscience of visual object recognition
- Orbitofrontal cortex
- Facilitation
- Visual cortex
- Functional magnetic resonance imaging
- Stimulus (psychology)
- Psychology