Location: Toulouse, France
- Speed of processing in the human visual systemS Thorpe
Centre de Recherche Cerveau and Cognition, Toulouse, France
Nature 381:520-2. 1996..ERP analysis revealed a frontal negativity specific to no-go trials that develops roughly 150 ms after stimulus onset. We conclude that the visual processing needed to perform this highly demanding task can be achieved in under 150 ms...
- Rapid visual categorization of natural scene contexts with equalized amplitude spectrum and increasing phase noiseOlivier R Joubert
Centre de Recherche Cerveau et Cognition, Universite de Toulouse, UPS, France
J Vis 9:2.1-16. 2009..This two-phase strategy could maximize categorization performance if the diagnostic features of man-made environments tolerate higher levels of noise than natural features, as proposed recently...
- Early interference of context congruence on object processing in rapid visual categorization of natural scenesOlivier R Joubert
UPS, Centre de Recherche Cerveau et Cognition CNRS, CerCo, Universite de Toulouse, Toulouse, France
J Vis 8:11.1-18. 2008..Facilitation would be induced by the customary co-activation of "congruent" populations of neurons whereas interference would take place when conflictual populations of neurons fire simultaneously...
- Processing scene context: fast categorization and object interferenceOlivier R Joubert
Universite, Toulouse 3, CerCo, UPS, France
Vision Res 47:3286-97. 2007..These data also suggest early interactions between scene and object representations compatible with contextual influences on object categorization in a parallel network...
- Rapid categorization of foveal and extrafoveal natural images: associated ERPs and effects of lateralizationDenis Fize
Centre de Recherche Cerveau and Cognition UMR 5549, CNRS UPS, Faculte de Medecine de Rangueil, 133 route de Narbonne, 31062 Toulouse, France
Brain Cogn 59:145-58. 2005..Latencies, slopes, and peak amplitudes of this differential activity were invariant to stimulus position and attentional load. Stimulus location uncertainty and lateralization did not affect speed of visual processing...
- Visual activation in prefrontal cortex is stronger in monkeys than in humansKatrien Denys
K U Leuven Medical School, B 3000 Leuven, Belgium
J Cogn Neurosci 16:1505-16. 2004..This difference was observed for two different stimulus sets, at two field strengths, and over a range of tasks. These results suggest that there may be more volitional control over visual processing in humans than in monkeys...
- The processing of visual shape in the cerebral cortex of human and nonhuman primates: a functional magnetic resonance imaging studyKatrien Denys
Laboratorium voor Neuro en Psychofysiologie, K U Leuven Medical School, Campus Gasthuisberg, B 3000 Leuven, Belgium
J Neurosci 24:2551-65. 2004..The shape-sensitive regions can be used to constrain the warping of monkey to human cortex and suggest a large expansion of lateral parietal and superior temporal cortex in humans compared with monkeys...
- Similarities and differences in motion processing between the human and macaque brain: evidence from fMRIGuy A Orban
K U Leuven, Laboratorium voor Neuro en Pyschofysiologie, Campus Gasthuisberg, Herestraat 49, B 3000 Leuven, Belgium
Neuropsychologia 41:1757-68. 2003..On the other hand, striking functional differences also emerged: in humans V3A and several regions in the intraparietal sulcus (IPS) are much more motion sensitive than their simian counterparts...
- The retinotopic organization of primate dorsal V4 and surrounding areas: A functional magnetic resonance imaging study in awake monkeysDenis Fize
Laboratorium voor Neuroen Psychofysiologie, Katholieke Universiteit Leuven, Campus Gasthuisberg, Leuven B 3000, Belgium
J Neurosci 23:7395-406. 2003..This finding indicates that early visual cortex is mostly conserved throughout hominid evolution...
- Stereopsis activates V3A and caudal intraparietal areas in macaques and humansDoris Y Tsao
Massachusetts General Hospital, NMR Center, Athinoula A Martinos Center, Charlestown, Massachusetts 02129, USA
Neuron 39:555-68. 2003..Thus, in both primate species a small cluster of areas at the parieto-occipital junction appears to be specialized for stereopsis...
- Extracting 3D from motion: differences in human and monkey intraparietal cortexW Vanduffel
Laboratorium voor Neuro en Psychofysiologie, Katholieke Universiteit Leuven, Campus Gasthuisberg, Herestraat 49, Leuven B 3000, Belgium
Science 298:413-5. 2002..In contrast, intraparietal areas showed significant 3D-SFM activation in humans but not in monkeys. This suggests that human intraparietal cortex contains visuospatial processing areas that are not present in monkeys...
- Repeated fMRI using iron oxide contrast agent in awake, behaving macaques at 3 TeslaFrancisca P Leite
Massachusetts Institute of Technology, Department of Nuclear Engineering, Cambridge, Massachusetts 02139, USA
Neuroimage 16:283-94. 2002..Overall, the contrast agent produced a dramatic improvement in functional brain imaging results in the awake, behaving primate at this field strength. (c) 2002 Elsevier Science (USA)...
- Visual motion processing investigated using contrast agent-enhanced fMRI in awake behaving monkeysW Vanduffel
Laboratorium voor Neuro en Psychofysiologie, Katholieke Universiteit Leuven, Campus Gasthuisberg, Herestraat 49, Belgium
Neuron 32:565-77. 2001..Moving lines activate some regions that have not been previously implicated in motion processing. Overall, the results clarify the relationship between the motion pathway and the dorsal stream in primates...
- Humans and monkeys share visual representationsDenis Fize
Universite de Toulouse, Universite Paul Sabatier, Centre de Recherche Cerveau et Cognition, 31062 Toulouse, France
Proc Natl Acad Sci U S A 108:7635-40. 2011....