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 ahougaard@dadlnet.dkwrote:
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
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