Selective visuo‐haptic processing of shape and texture
Open Access
- 9 October 2007
- journal article
- research article
- Published by Wiley in Human Brain Mapping
- Vol. 29 (10) , 1123-1138
- https://doi.org/10.1002/hbm.20456
Abstract
Previous functional neuroimaging studies have described shape‐selectivity for haptic stimuli in many cerebral cortical regions, of which some are also visually shape‐selective. However, the literature is equivocal on the existence of haptic or visuo‐haptic texture‐selectivity. We report here on a human functional magnetic resonance imaging (fMRI) study in which shape and texture perception were contrasted using haptic stimuli presented to the right hand, and visual stimuli presented centrally. Bilateral selectivity for shape, with overlap between modalities, was found in a dorsal set of parietal areas: the postcentral sulcus and anterior, posterior and ventral parts of the intraparietal sulcus (IPS); as well as ventrally in the lateral occipital complex. The magnitude of visually‐ and haptically‐evoked activity was significantly correlated across subjects in the left posterior IPS and right lateral occipital complex, suggesting that these areas specifically house representations of object shape. Haptic shape‐selectivity was also found in the left postcentral gyrus, the left lingual gyrus, and a number of frontal cortical sites. Haptic texture‐selectivity was found in ventral somatosensory areas: the parietal operculum and posterior insula bilaterally, as well as in the right medial occipital cortex, overlapping with a medial occipital cortical region, which was texture‐selective for visual stimuli. The present report corroborates and elaborates previous suggestions of specialized visuo‐haptic processing of texture and shape. Hum Brain Mapp 2008.Keywords
This publication has 82 references indexed in Scilit:
- Cortical topography of human anterior intraparietal cortex active during visually guided graspingCognitive Brain Research, 2005
- Task-specific recruitment of dorsal and ventral visual areas during tactile perceptionPublished by Elsevier ,2004
- Separate visual pathways for perception and actionPublished by Elsevier ,2003
- Human Somatosensory Area 2: Observer-Independent Cytoarchitectonic Mapping, Interindividual Variability, and Population MapNeuroImage, 2001
- Areas 3a, 3b, and 1 of Human Primary Somatosensory CortexNeuroImage, 1999
- Coding of modified body schema during tool use by macaque postcentral neuronesNeuroReport, 1996
- Tactile agnosiaBrain, 1996
- Improved Assessment of Significant Activation in Functional Magnetic Resonance Imaging (fMRI): Use of a Cluster‐Size ThresholdMagnetic Resonance in Medicine, 1995
- A PET Study of Somatosensory Discrimination in Man. Microgeometry Versus MacrogeometryEuropean Journal of Neuroscience, 1994
- The relation of corpus callosum connections to architectonic fields and body surface maps in sensorimotor cortex of new and old world monkeysJournal of Comparative Neurology, 1983