Steve Engel, Department of Psychology, University of MinnesotaĢ5 A tale of three special populations: What can we learn about brain organization from people born blind, deaf, or without hands?Įlla Striem-Amit, Postdoctoral Fellow, Department of Psychology, Harvard University I will demonstrate an application of this framework for modeling the shape evolution of white matter tracts in normally developing children. This framework allows: (1) describing the tract shape using a concise geometric model (2) spatial correspondence mapping (3) registration of fiber bundles across subjects (4) bundle deformation estimation. In this talk I will describe a framework we developed for shape analysis of fiber bundles. My work focuses on analyzing the shape variability of white matter tracts across populations. fractional anisotropy) and different pathological conditions. Most studies on white matter variability focus on understanding the relationship between tissue properties (e.g. Tanya Glozman, Electrical Engineering, Stanford University Thus the acquisition of an additional perceptual expertise modifies extensively the laterality pattern in the visual system.ġ5 Framework for shape analysis of white matter tracts Finally, correlation measures across subjects did not support a causal link between the leftward and rightward shifts. Moreover, these laterality shifts generalized to categories other than music and faces. The results supported both predictions, and allowed to locate the leftward shift to the inferior temporal gyrus and the rightward shift to the fusiform cortex. To test these predictions, professional musicians and non-musicians viewed pictures of musical notation, faces, words, tools and houses in the MRI, and laterality was assessed in the ventral stream combining ROI and voxel-based approaches. Applying the same logic to the acquisition of high- level musical literacy, we predicted that, in musicians as compared to non-musicians, occipitotemporal activations should show a leftward shift for music reading, and an additional rightward push for face perception. Due to the overall lateralization of the language network, specialization for printed words develops in the left occipitotemporal cortex, allegedly inducing a secondary shift of visual face processing to the right, in literate as compared to illiterate subjects. The acquisition of literacy has a profound impact on the functional specialization and lateralization of the visual cortex. Kevin Weiner presents "Natural speech reveals the semantic maps that tile human cerebral cortex", published by Huth and colleagues in Nature (2016)Ģ9 Musical literacy shifts asymmetries in the ventral visual cortex These sorts of ‘attractors’ in face space suggest a new way to think about face representation. Instead, the errors lead to fascinating patterns of convergence in face space that reveal our underlying assumptions about what sorts of faces are most likely (as when Black faces are remembered as much Whiter than they truly were), and how different features relate to each other (as when angry faces are remembered as Blacker than they truly were). Over time, errors accrue, but these errors are not random. This work introduces the ‘TeleFace’ method - a type of serial reproduction in which face representations in visual working memory are passed through ‘chains’ of multiple observers. Here I will describe work exploring the ‘mental defaults’ that are embedded in the representation of race and emotion in faces. And within the multidimensional ‘face space’ in which faces are represented, two of the most salient features (in terms of both active scientific work and everyday interest) are race and emotion. The most salient stimuli in our lives may be other people’s faces, in part because they are so rich and complex. Stefan Uddenberg, Yale Perception & Cognition Lab Have an interesting paper that we should review? Post it in the VL Article Repository Current Schedule 2017 Schedule AugustĢ TeleFace: The Hidden Nature of ‘Face Space’ as Revealed by Serial Reproduction In general, it should be no problem to bump paper discussions to a later week, so if you see a date you're interested in, chances are we can accommodate you.īelow is a list of Vision Lunches for the current year (2011). Please email Peter and Kevin if you're interested in presenting. In particular, Vision Lunches are intended to allow people in Vision labs at Stanford to hear about each other's work early on, when feedback can be important, and the results are new and exciting. We would like to encourage anyone in the Stanford community (or outside it) who is working on vision-related research to come and talk about their stuff.
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