Visual Topography of Human Intraparietal Sulcus

By Jascha D. Swisher, Mark A. Halko, Lotfi B. Merabet, Stephanie A. McMains, D. Somers. Journal of Neuroscience, 2007

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Human parietal cortex is implicated in a wide variety of sensory and cognitive functions, yet its precise organization remains unclear. Visual field maps provide a potential structural basis for descriptions of functional organization. Here, we detail the topography of a series of five maps of the contralateral visual hemifield within human posterior parietal cortex. These maps are located along the medial bank of the intraparietal sulcus (IPS) and are revealed by direct visual stimulation during functional magnetic resonance imaging, allowing these parietal regions to be routinely and reliably identified simultaneously with occipital visual areas. Two of these maps (IPS3 and IPS4) are novel, whereas two others (IPS1 and IPS2) have previously been revealed only by higher-order cognitive tasks. Area V7, a previously identified visual map, is observed to lie within posterior IPS and to share a foveal representation with IPS1. These parietal maps are reliably observed across scan sessions; however, their precise topography varies between individuals. The multimodal organization of posterior IPS mirrors this variability in visual topography, with complementary tactile activations found immediately adjacent to the visual maps both medially and laterally. These visual maps may provide a practical framework in which to characterize the functional organization of human IPS.

Subfields: Cognitive Neuroscience, Experimental and Cognitive Psychology

View Paper: https://www.semanticscholar.org/paper/5944b76c2cc651cc7749499ff017a6265cb42bfe

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Citations in the corpus

DIFFUSION-WEIGHTED IMAGING TRACTOGRAPHY-BASED PARCELLATION OF THE HUMAN PARIETAL CORTEX AND COMPARISON WITH HUMAN AND MACAQUE RESTING STATE FUNCTIONAL CONNECTIVITY (2011, background): “The two most posterior retinopically mapped divisions of parietal cortex, IPS1 and IPS2, fall within this region (Silver et al., 2005; Swisher et al., 2007).”
Imaging retinotopic maps in the human brain (2010, background): “This map turned out to be one of a series located in the IPS, and each one appears to represent a hemifield (Press et al., 2001; Silver et al., 2005; Swisher et al., 2007).”
The organization of the human cerebral cortex estimated by intrinsic functional connectivity. (2011, background): “The dorsal boundary of the central and peripheral visual networks continued outside the V1-V3 complex and cut through the hemifield maps dorsal and lateral to V3v, possibly including V3A, V3B, and V7 (Larsson and Heeger 2006; Swisher et al. 2007; Tootell et al. 1998).”
Visual field maps in human cortex. (2007, unknown): “The maps near V1 are the prototypical cluster, but several other clusters—such as near V3A/V3B, IPS, hMT+, and VO—have also been identified (Brewer et al., 2005; Larsson and Heeger, 2006; Schluppeck et al., 2005; Silver et al., 2005; Swisher et al., 2007; Wandell et al., 2006).”
Probabilistic Maps of Visual Topography in Human Cortex. (2015, methodology): “Retinotopic Mapping Standard retinotopic mapping was performed for each subject using a color and luminance varying flickering checkerboard stimulus (Swisher et al. 2007; Arcaro et al. 2009).”
Mapping Human Cortical Areas in vivo Based on Myelin Content as Revealed by T1- and T2-weighted MRI (2011, background): “This strip overlaps extensively with cortical areas V7 and IPS1-4 defined in a retinotopic fMRI study (Swisher et al., 2007) (Fig.”
Cortical Hierarchies Perform Bayesian Causal Inference in Multisensory Perception (2015, background): “At the next stage, in posterior intraparietal sulcus (IPS1–2), location is estimated under the assumption that the two signals are from a common source.”
Parcellations and hemispheric asymmetries of human cerebral cortex analyzed on surface-based atlases. (2012, methodology): “2010) and SHM07 case 1 (Swisher et al. 2007) in relation to the most likely boundaries of probabilistic areas 17 and 18 (black contours, see also Fig.”
Alpha-beta and gamma rhythms subserve feedback and feedforward influences among human visual cortical areas (2016, unknown): “In the human brain the strongest evidence of homology comes mainly from the ventral part of human V4, which has been mapped by various studies in a corresponding location and with similar visuotopic organization (Brewer et al., 2005; Van Essen, 2005; Swisher et al., 2007; Kolster et al., 2010).”