I'd also be very interested to hear about good reinotopic stimuli; we've used 6Hz and 14 ring sizes for eccentricity mapping in the past.
Thomas Ballinger On Thu, Jul 7, 2011 at 3:56 AM, Anders Hougaard <ahouga...@dadlnet.dk>wrote: > Dear freesurfers, > > > Which stimuli do you think provide the best retinotopic maps? > > I have done a retinotopy analysis using the following stimuli: > > Polar angle: > > - 45 deg counter-clockwise rotating wedge > - 8 unique positions > - flickering at 2 Hz > - stimulation period: 36 sec > - no. of cycles: 6 > - TR = 3 > > Eccentricity: > > - expanding ring > - 8 unique positions > - flickering at 2 Hz > - stimulation period: 36 sec > - no. of cycles: 6 > - TR = 3 > > Any suggestions on how to optimize this stimulation? > E.g. different period length, more runs, bi-directional, different TR > > Thank you! > > Best regards, > > Anders > > > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only for the person to whom it > is > addressed. If you believe this e-mail was sent to you in error and the > e-mail > contains patient information, please contact the Partners Compliance > HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to you in > error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. > >
_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
