RT Journal Article
SR Electronic
T1 Functional Anatomy of Spatial Mental Imagery Generated from Verbal Instructions
JF The Journal of Neuroscience
JO J. Neurosci.
FD Society for Neuroscience
SP 6504
OP 6512
DO 10.1523/JNEUROSCI.16-20-06504.1996
VO 16
IS 20
A1 Mellet, Emmanuel
A1 Tzourio, Nathalie
A1 Crivello, Fabrice
A1 Joliot, Marc
A1 Denis, Michel
A1 Mazoyer, Bernard
YR 1996
UL http://www.jneurosci.org/content/16/20/6504.abstract
AB 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.