A great deal of research in vision has focused on the spatial processing of visual stimuli. However, an equally important attribute of visual stimuli is their timing. For example, timing is essential for processing dynamic stimuli such as visual motion. We have previously developed a hypothesis that the right parietal lobe serves a generalized role in visual stimulus timing. These ideas were formulated in studies with parietal lesioned patients. Here we will test and extend these ideas in three ways. First we will target the right parietal lobe using transcranial magnetic stimulation (TMS) with tasks of visual motion in an attempt to examine more in detail the processing underlying visual timing with a higher spatial and temporal resolution. Second, we will use TMS to test the generality of our model using auditory tasks such us auditory timing. Third we will use TMS during biological motion perception. The results of these studies should provide important new insight into the role of parietal cortex, and could suggest a common timing mechanism could subserve many seemingly unrelated sensory capabilities.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32EY015960-03
Application #
7110947
Study Section
Special Emphasis Panel (ZRG1-F02B (20))
Program Officer
Oberdorfer, Michael
Project Start
2004-09-01
Project End
2007-08-31
Budget Start
2006-09-01
Budget End
2007-08-31
Support Year
3
Fiscal Year
2006
Total Cost
$55,852
Indirect Cost
Name
Beth Israel Deaconess Medical Center
Department
Type
DUNS #
071723621
City
Boston
State
MA
Country
United States
Zip Code
02215
Battelli, Lorella; Alvarez, George A; Carlson, Thomas et al. (2009) The role of the parietal lobe in visual extinction studied with transcranial magnetic stimulation. J Cogn Neurosci 21:1946-55
VanRullen, Rufin; Pascual-Leone, Alvaro; Battelli, Lorella (2008) The continuous Wagon wheel illusion and the 'when'pathway of the right parietal lobe: a repetitive transcranial magnetic stimulation study. PLoS One 3:e2911
Battelli, Lorella; Pascual-Leone, Alvaro; Cavanagh, Patrick (2007) The 'when'pathway of the right parietal lobe. Trends Cogn Sci 11:204-10
Grossman, Emily D; Battelli, Lorella; Pascual-Leone, Alvaro (2005) Repetitive TMS over posterior STS disrupts perception of biological motion. Vision Res 45:2847-53