Temporal limitations in object processing across the human ventral visual pathway. Export

@article{citeulike:1293224, abstract = {Behavioral studies have shown that object recognition becomes severely impaired at fast presentation rates, indicating a limitation in temporal processing capacity. Here, we investigated whether this behavioral limit in object recognition reflects limitations in the temporal processing capacity of early visual areas tuned to basic features or high-level areas tuned to complex objects. We used functional MRI (fMRI) to measure the temporal processing capacity of multiple areas along the ventral visual pathway progressing from the primary visual cortex (V1) to high-level object-selective regions, specifically the fusiform face area (FFA) and parahippocampal place area (PPA). Subjects viewed successive images of faces or houses at presentation rates varying from 2.3-37.5 items/second while performing an object discrimination task. Measures of the temporal frequency response profile of each visual area revealed a systematic decline in peak tuning across the visual hierarchy. Areas V1-V3 showed peak activity at rapid presentation rates of 18-25 items/sec, area V4v peaked at intermediate rates (9 items/sec), and the FFA and PPA peaked at the slowest temporal rates (4-5 items/sec). Our results reveal a progressive loss in the temporal processing capacity of the human visual system as information is transferred from early visual areas to higher areas. These data suggest that temporal limitations in object recognition likely result from the limited processing capacity of high-level object-selective areas rather than that of earlier stages of visual processing.}, address = {Psychology, Princeton University, Princeton, New Jersey, United States.}, author = {McKeeff, Thomas James J. and Remus, David A A. and Tong, Frank}, citeulike-article-id = {1293224}, citeulike-linkout-0 = {http://dx.doi.org/10.1152/jn.00568.2006}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/17493920}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=17493920}, day = {9}, doi = {10.1152/jn.00568.2006}, issn = {0022-3077}, journal = {J Neurophysiol}, keywords = {fmri, object, temporal}, month = {May}, posted-at = {2008-08-27 19:38:37}, priority = {2}, title = {Temporal limitations in object processing across the human ventral visual pathway.}, url = {http://dx.doi.org/10.1152/jn.00568.2006}, year = {2007} }

TY - JOUR ID - citeulike:1293224 L3 - citeulike-article-id:1293224 N2 - Behavioral studies have shown that object recognition becomes severely impaired at fast presentation rates, indicating a limitation in temporal processing capacity. Here, we investigated whether this behavioral limit in object recognition reflects limitations in the temporal processing capacity of early visual areas tuned to basic features or high-level areas tuned to complex objects. We used functional MRI (fMRI) to measure the temporal processing capacity of multiple areas along the ventral visual pathway progressing from the primary visual cortex (V1) to high-level object-selective regions, specifically the fusiform face area (FFA) and parahippocampal place area (PPA). Subjects viewed successive images of faces or houses at presentation rates varying from 2.3-37.5 items/second while performing an object discrimination task. Measures of the temporal frequency response profile of each visual area revealed a systematic decline in peak tuning across the visual hierarchy. Areas V1-V3 showed peak activity at rapid presentation rates of 18-25 items/sec, area V4v peaked at intermediate rates (9 items/sec), and the FFA and PPA peaked at the slowest temporal rates (4-5 items/sec). Our results reveal a progressive loss in the temporal processing capacity of the human visual system as information is transferred from early visual areas to higher areas. These data suggest that temporal limitations in object recognition likely result from the limited processing capacity of high-level object-selective areas rather than that of earlier stages of visual processing. JF - J Neurophysiol SN - 0022-3077 AD - Psychology, Princeton University, Princeton, New Jersey, United States. TI - Temporal limitations in object processing across the human ventral visual pathway. KW - fmri KW - object KW - temporal AU - McKeeff, Thomas James AU - Remus, David A AU - Tong, Frank PY - 2007/05/09/ UR - http://dx.doi.org/10.1152/jn.00568.2006 ER -