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Selective visuo‐haptic processing of shape and texture
A human functional magnetic resonance imaging study in which shape and texture perception were contrasted using haptic stimuli presented to the right hand, and visual stimuli presented centrally corroborates and elaborates previous suggestions of specialized visuo‐haptic processing of texture and shape.
Neural Evidence Linking Visual Object Enumeration and Attention
- K. Sathian, T. Simon, S. Peterson, G. Patel, J. Hoffman, Scott T. Grafton
- Psychology, BiologyJournal of Cognitive Neuroscience
This work evaluated the first direct neural support for mapping the subitizing-counting dichotomy onto separable processes mediating preattentive vision and shifts of visual attention at a neural level.
Effect of hemodynamic variability on Granger causality analysis of fMRI
Multisensory cortical processing of object shape and its relation to mental imagery
- Minming Zhang, Valerie Weisser, R. Stilla, S. Prather, K. Sathian
- Biology, PsychologyCognitive, affective & behavioral neuroscience
- 1 June 2004
Ratings of the vividness of visual imagery strongly predicted the amount of haptic shape-selective activity in the right, but not in the left, lateral occipital complex, and visual imagery appears to contribute to activation of some,but not all, visual cortical areas during haptic perception.
Involvement of visual cortex in tactile discrimination of orientation
This is the first demonstration that visual cortical processing is necessary for normal tactile perception, and indicates that visual cortex is closely involved in tactile discrimination of orientation.
Activity and effective connectivity of parietal and occipital cortical regions during haptic shape perception
Effective connectivity during haptic perception: A study using Granger causality analysis of functional magnetic resonance imaging data
Art for reward's sake: Visual art recruits the ventral striatum
Visual cortical activity during tactile perception in the sighted and the visually deprived.
- K. Sathian
- Psychology, BiologyDevelopmental psychobiology
- 1 April 2005
Overall, it appears that the nature of visual cortical activity during nonvisual tasks in the sighted can be influenced by late-onset blindness and even by brief interruptions of visual input; however, the relevant neural plasticity seems to considerably more exuberant if vision is lost very early in life or was never present, which suggests that there is a critical period for the maximal expression of such plasticity.
Temporal Cues Contribute to Tactile Perception of Roughness
Psychophysically, the contribution of temporal cues to human tactile perception of roughness, using gratings varying in either R or G, is investigated, finding that roughness magnitude estimates depended on both G and Ft.