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