Hello Doug,

Thank you for your previous answer.
I have another question in the mkanalysis. When I run mkanalysis is it possible 
to analyse only a part of my run?
I mean if my stimuli was 100s per run, can i tell mkanalysis to ignore the 
first 20s and the last 30s and analyse the 50 in the middle?

Walid

> On Mar 21, 2018, at 0:10, Douglas Greve <dgr...@mgh.harvard.edu> wrote:
> 
> Sorry, yes you can use an A-B blocked paradigm. Run mkanalysis-sess -help to 
> get more info
> 
>> On 3/20/18 4:28 AM, Walid Yassin wrote:
>> Hello all,
>> 
>> I would like to pose my question again in case it got missed.
>> 
>> Thank you.
>> 
>> WY
>> 
>>> On Mon, Mar 19, 2018 at 3:47 PM, Walid Yassin <walidyassi...@gmail.com> 
>>> wrote:
>>> Hi Doug,
>>> 
>>> Is it possible to run retinotopy-like analysis to reveal areas in the brain 
>>> responsible for a certain phase of a presented stimuli?
>>> Say, instead of presenting 0 - 360 degrees of rotating wedge per cycle, we 
>>> would like to present arbitrary scale of 0 - 100 of a particular stimulus 
>>> feature, that does not necessarily differ in their retinotopic locations.
>>> 
>>> We thought, if we pretend that scale-0 is equivalent to a wedge of 0 
>>> degree, and scale-50 is equivalent to a wedge of 180 degrees, and so on, we 
>>> would be able to map the cortical area corresponding to each value of the 
>>> scale.
>>> However, the retinotopy protocol of freesurfer requires the input of a 
>>> stimulus type “e.g. polar or eccen” and direction “e.g. pos or neg”, so our 
>>> analysis won’t work as we intend.
>>> 
>>> Running Freesurfer v5.3.0
>>> 
>>> Thank you
>>> 
>>> Walid
>> 
>> 
>> 
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