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      Functional Anatomy of Spatial Mental Imagery Generated from Verbal Instructions

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          Abstract

          Positron emission tomography (PET) was used to monitor regional cerebral blood flow variations while subjects were constructing mental images of objects made of three-dimensional cube assemblies from auditorily presented instructions. This spatial mental imagery task was contrasted with both passive listening (LIST) of phonetically matched nonspatial word lists and a silent rest (REST) condition. All three tasks were performed in total darkness. Mental construction (CONS) specifically activated a bilateral occipitoparietal–frontal network, including the superior occipital cortex, the inferior parietal cortex, and the premotor cortex. The right inferior temporal cortex also was activated specifically during this condition, and no activation of the primary visual areas was observed. Bilateral superior and middle temporal cortex activations were common to CONS and LIST tasks when both were compared with the REST condition. These results provide evidence that the so-called dorsal route known to process visuospatial features can be recruited by auditory verbal stimuli. They also confirm previous reports indicating that some mental imagery tasks may not involve any significant participation of early visual areas.

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          Author and article information

          Journal
          J Neurosci
          J. Neurosci
          jneuro
          jneurosci
          J. Neurosci
          The Journal of Neuroscience
          Society for Neuroscience
          0270-6474
          1529-2401
          15 October 1996
          : 16
          : 20
          : 6504-6512
          Affiliations
          [ 1 ]Groupe d’Imagerie Neurofonctionnelle, Commissariatà l’Energie Atomique-Département de Recherche Médicale and Délégation Gènèrale àla Recherche et Technologie EA 1555, Service Hospitalier Frédéric Joliot, 91401 Orsay Cedex, France, and
          [ 2 ]Groupe Cognition Humaine, Laboratoire d’Informatique et de Mécanique pour les Sciences de l’Ingénieur-Centre National de la Recherche Scientifique, 91400 Orsay, France
          Article
          PMC6578908 PMC6578908 6578908
          10.1523/JNEUROSCI.16-20-06504.1996
          6578908
          8815928
          88a9dea6-b15e-4783-85fa-c64c9b601352
          Copyright © 1996 Society for Neuroscience
          History
          : 5 April 1996
          : 18 July 1996
          : 24 July 1996
          Categories
          Articles

          parietal cortex,dorsal visual pathway,position emission tomography,frontal cortex,occipital cortex,cerebral blood flow,spatial mental imagery,precuneus

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