Michels L, de Lussanet M H E, Seitz R J, Lappe M, Kleiser R, 2006, "Functional organisation for biological motion in the fusiform gyrus" Perception 35 ECVP Abstract Supplement
Functional organisation for biological motion in the fusiform gyrus
L Michels, M H E de Lussanet, R J Seitz, M Lappe, R Kleiser
Humans easily recognise walking and running from point lights attached to the major joints of an otherwise invisible body (Johansson, 1973 Perception & Psychophysics 14 201 - 211). fMRI studies have shown that regions of the fusiform gyrus (FG) and the superior temporal sulcus (STS) respond stronger to biological motion than to scrambled controls (Grossman et al, 2002 Neuron 35 1167 - 1175). Different visual categories are represented in different regions of the FG (Tarr and Gauthier, 2000 Nature Neuroscience 3 764 - 769). In monkeys, different views of human faces activated different regions in the inferotemporal cortex (Wang et al, 1998 Neuroscience Research 32 33 - 46), which is supposed to be homologous to human FG. In the present study, we investigated, using fMRI, whether human FGs also possess a functional map for different orientations of biological motion. Leftward-facing point-light walkers activated a different region of the FG in both hemispheres than rightward-facing ones. We found this in a single-subject analysis. Such a functional map was not present in STS. Our findings suggest that the FG not only is organised in different regions for different visual categories, but also that different views of the same object activate different regions.
[Supported by the German Science Foundation, the German Federal Ministry of Education and Research BioFuture Prize, and the EC Projects ECo Vision and Eurokinesis.]
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