Tilt discrimination display in which subjects discriminated whether both lines were tilted to the right or left (shown) of vertical. b Odd-element display in which subjects determined whether or not an odd-element was present. An odd-element is shown in the right bottom circle. Circles, which do not appear in the actual stimulus display, designate the four possible locations in which an odd-element may appear. c Schematic of a trial with TMS
Subjects began each trial by fixating on a fixation point which
appeared for 1500 ms (Fig. 1 c).
Single pulse TMS was delivered in randomly selected trials at
randomly selected delays measured from the onset of the visual
stimulus (Fig. 1 c) to posterior occipital cortex by a
Cadwell MES-10 magnetic stimulator through a 7 cm diameter
We used a tilt discrimination task for this purpose, in which
subjects decided if two foveally-presented, parallel black lines
appearing within a white square were tilted to the right or left of
vertical (Fig. 1 a).
In our version of this task a 5×5 array of black lines was
presented within a 3°×3° white square in the center of a black
computer screen (Fig. 1 b).
In trials containing an odd-element, it was randomly located in one
of four oblique locations, one in each visual field quadrant
(Fig. 1 b).
Viewing this image requires a subscription. If you are a subscriber, please log in.
This image is from the article titled "Perceptual learning of line orientation modifies the effects of transcranial magnetic stimulation of visual cortex"
(from Experimental Brain Research), which is copyrighted by Springer-Verlag. For more information on the
copyright for this image, please refer to the full image caption and to the
The image is being made available for non-commercial purposes for subscribers to SpringerImages. For more information on what you are allowed to do with this image, please see our copyright policy.
To request permissions to use any copyrighted material, please visit the source document.
Report a copyright concern regarding this image.
Log in or register to save your favorite images and download them as high-quality PowerPoint or PDF files.
Log in or register to save your search criteria.
© Springer, part of Springer Science+Business Media.
Remote Address: 18.104.22.168 Server: 21