Lightnews — Scholar-powered news

Reposted by Eneko Uruñuela

Imaging Neuroscience @imagingneurosci.bsky.social · Jul 28

New paper in Imaging Neuroscience by Mairi S. Houlgreave, Stephen Jackson, et al:

Uncovering the neural correlates of the urge-to- blink: A study utilising subjective urge ratings and paradigm free mapping

doi.org/10.1162/IMAG...

1 7

Reposted by Eneko Uruñuela

Dan Handwerker @danielhandwerker.bsky.social · Jun 25

#OHBM2025 multi-echo fMRI users meet-up at 7:30PM on Thursday, June 26th very close to the convention center. DM me for location information.

1 2 6

Reposted by Eneko Uruñuela

Dan Handwerker @danielhandwerker.bsky.social · May 28

The recording of yesterday's multi-echo fMRI users meeting is now up! youtu.be/LUyvXA81AEs?... @enekourunuela.com @tsalo.bsky.social

3 19

Eneko Uruñuela @enekourunuela.com · May 21

That feeling when you make your model super efficient it can not only fit much bigger that, but runs faster at the same time! 😎

Eneko Uruñuela @enekourunuela.com · May 13

Don’t miss it if you’re into multi echo fMRI!

#neuroskyence

Dan Handwerker @danielhandwerker.bsky.social · May 12

Next multi-echo fMRI users meeting scheduled for May 27th. Also tedana v25.0.0 released! More details & a form to give input about the users meeting is at: groups.google.com/g/tedana-new... #Neuroimaging

May multi-echo fMRI users meeting and tedana v25.0.0

groups.google.com

2

Reposted by Eneko Uruñuela

Dan Handwerker @danielhandwerker.bsky.social · May 12

Next multi-echo fMRI users meeting scheduled for May 27th. Also tedana v25.0.0 released! More details & a form to give input about the users meeting is at: groups.google.com/g/tedana-new... #Neuroimaging

May multi-echo fMRI users meeting and tedana v25.0.0

groups.google.com

1 8 12

Eneko Uruñuela @enekourunuela.com · May 7

My heart is not ready for a crazy game like that one 😅

Reposted by Eneko Uruñuela

Dr. Molly Bright @brightmg.bsky.social · May 3

Breath hold fMRI is great for measuring CVR... *except when your participant or patient doesn't quite perform the task the way you'd like. Let's see if we can fix that! (Spoiler, it looks like we can, using the respiratory belt data to predict or fill in missing PETCO2 data!)

Imaging Neuroscience @imagingneurosci.bsky.social · Apr 15

New paper in Imaging Neuroscience by Rebecca G. Clements, Molly G. Bright, et al:

Quantitative mapping of cerebrovascular reactivity amplitude and delay with breath-hold BOLD fMRI when end-tidal CO2 quality is low

doi.org/10.1162/imag...

1 4 15

Eneko Uruñuela @enekourunuela.com · May 1

And complain less (I hope)

Eneko Uruñuela @enekourunuela.com · Apr 29

Phew 😮‍💨

1

Eneko Uruñuela @enekourunuela.com · Apr 25

True, but you would still need a ground truth to learn from, right?

I’m more than happy to discuss ideas in this topic.

2

Eneko Uruñuela @enekourunuela.com · Apr 25

Research would become boring if we could do that 😜

1

Eneko Uruñuela @enekourunuela.com · Apr 25

Yes, I meant we don’t really know the ground truth…

Plus, the HRF differs across different regions of the brain and possibly across the population.

A very interesting but hard problem to solve!

With our algorithms we always saw that assuming the shape was good enough for most cases 🤷‍♂️

1 2

Eneko Uruñuela @enekourunuela.com · Apr 25

How would you learn the HRF from the data when the ground truth doesn’t exist?

Even if you were to transfer learn from task fMRI data, the model would be quite biased when applied to rest…

2 2

Eneko Uruñuela @enekourunuela.com · Apr 24

The single echo is also available in AFNI as 3dPFM.

I would suggest using pySPFM with stability selection for better results though.

2

Eneko Uruñuela @enekourunuela.com · Apr 22

We showed that with our multi-echo multivariate paradigm free mapping approach we could get fairly close to GLM activity maps in task fMRI data. Stability selection (not multi-echo dependent) really helped us get robust results.

www.sciencedirect.com/science/arti...