Hierarchical Processing of Tactile Shape in the Human Brain

  title={Hierarchical Processing of Tactile Shape in the Human Brain},
  author={Anna Bodeg{\aa}rd and Stefan Geyer and Christian Grefkes and Karl Zilles and Per E. Roland},
It is not known exactly which cortical areas compute somatosensory representations of shape. This was investigated using positron emission tomography and cytoarchitectonic mapping. Volunteers discriminated shapes by passive or active touch, brush velocity, edge length, curvature, and roughness. Discrimination of shape by active touch, as opposed to passive touch, activated the right anterior lobe of cerebellum only. Areas 3b and 1 were activated by all stimuli. Area 2 was activated with… CONTINUE READING
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