Polymodal motion processing in posterior parietal and premotor cortex: a human fMRI study strongly imlies equivalencies
between human and monkeys
F.Bremmer, A. Schlack, N.J. Shah, O. Zafiris, M. Kubischik, K.-P. Hoffmann & K. Zilles
Neuron, 29:287-296, 2001
- In monkeys, posterior parietal and premotor cortex play an important
integrative role in polymodal motion processing. In contrast, our understanding of the convergence of senses in
humans is only at its beginning. To test for equivalencies between macaque and human polymodal motion processing,
we used functional MRI in normals while presenting moving visual, tactile, or auditory stimuli. Increased neural
activity evoked by all three stimulus modalities was found in the depth of the intraparietal sulcus (IPS), ventral
premotor, and lateral inferior postcentral cortex. The observed activations strongly suggest that polymodal motion
processing in humans and monkeys is supported by equivalent areas. The activations in the depth of IPS imply that
this area constitutes the human equivalent of macaque area VIP.
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