title: Comment on "Movement intention after parietal cortex stimulation in humans".
abstract: Desmurget et al. (Reports, 8 May 2009, p. 811) applied direct electrical stimulation (DES) to the human cortex to study the origin of movement intention. Their interpretation assumed that DES causes cortical activation, whereas it is possible that it actually evokes deactivation. The lack of certain knowledge about the true effects of DES limits its use for validation of cognitive models.
authors.affiliation: Section of Neuropsychology, Center of Neurology, Hertie-Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany. Karnath@uni-tuebingen.de
authors.forename: Hans-Otto
authors.initials: HO
authors.lastname: Karnath
authors.forename: Svenja
authors.initials: S
authors.lastname: Borchers
authors.forename: Marc
authors.initials: M
authors.lastname: Himmelbach
mesh_terms: D001364:Awareness; D001931:Brain Mapping; D004558:Electric Stimulation; D005121:Extremities / Q000502:physiology; D006801:Humans; D033182:Intention; D008046:Lip / Q000502:physiology; D008959:Models, Neurological; D009068:Movement; D010296:Parietal Lobe / Q000502:physiology*