Journal
CORTEX
Volume 42, Issue 5, Pages 750-754Publisher
ELSEVIER MASSON
DOI: 10.1016/S0010-9452(08)70413-1
Keywords
TMS; Shepard-Metzler; posterior parietal; enantiomorphs
Ask authors/readers for more resources
A recently published study used the interference strategy of transcranial magnetic stimulation (TMS) to demonstrate the role of the right posterior parietal cortex (PPC) in the mental rotation of alphanumeric stimuli. We used similar stimulation parameters over the same left and right PPC regions, and examined the ability to rotate more complex 3D Shepard and Metzler (1971) images. There was reduced accuracy of performance with both right and left PPC stimulation for different angles of rotation of the visual stimuli. Right PPC stimulation led to reduced accuracy to rotate stimuli by 120 degrees, whereas left PPC stimulation affected 180 degrees rotation. We hypothesise that the two hemispheres make different contributions to the processing underlying visuospatial mental imagery: the right PPC is important for spatial rotations through smaller angles; the left hemisphere has a unique role when the stimuli to be compared are rotated through 180 degrees, a task that engages verbal strategies due to the well-documented special nature of enantiomorphs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available