Jayson Jeganathan

[Jayson Jeganathan @jaysonjeg]

Do you work on surface MRI such as HCP data? Our paper is finally out in Imaging Neuroscience, showing biases in surface fMRI. The revised ms has many new insights!
TLDR: Vertices are much closer to each other in sulci, resulting in (fake) high spatial autocorrelation. (1/5)

[Jayson Jeganathan @jaysonjeg]

@alexblania @grok what is this

[Imaging Neuroscience @ImagingNeurosci]

New paper in Imaging Neuroscience by Jayson Jeganathan, Michael Breakspear, et al:

Spurious correlations in surface-based functional brain imaging

https://t.co/EyNE1RBrCg

[Jayson Jeganathan @jaysonjeg]

@GianDuma This specific issue of mapping onto an irregular surface mesh is likely not relevant to MEEG. But you can have a different gyral bias in MEEG as you outlined

[Jayson Jeganathan @jaysonjeg]

Do you work on surface MRI such as HCP data? Our paper is finally out in Imaging Neuroscience, showing biases in surface fMRI. The revised ms has many new insights!
TLDR: Vertices are much closer to each other in sulci, resulting in (fake) high spatial autocorrelation. (1/5)

[Jayson Jeganathan @jaysonjeg]

This was a team effort! @KoussisNikitas @tremodian @Sina_Mansour_L @AndrewZalesky @DrBreaky @phogat_richa @jchrispang

[Jayson Jeganathan @jaysonjeg]

I'm proud of this work, and I hope this paper helps you to avoid spurious conclusions in your work. Check out the full paper (https://t.co/dQtJjKVEcK) for a detailed breakdown and for other downstream analyses that can be impacted (FC fingerprinting, hyperalignment, etc). (5/5)

[Jayson Jeganathan @jaysonjeg]

Amazing paper !

[Weinan Sun @sunw37]

1/12 How do animals build an internal map of the world? In our new paper, we tracked thousands of neurons in mouse CA1 over days/weeks as they learned a VR navigation task. @nspruston @HHMIJanelia, w/ co-1st author @JohanWinn
Video summary: https://t.co/mMvsT8TVc9
Paper: https://t.co/35k5tWdvOe

[Dr. Sheen S. Levine @sslevine]

In markets, there are price bubbles. In science, are there popularity bubbles? When promising research gets hyped up, it can lead to a burst of activity followed by a dramatic collapse, shows huge bibliometric study @Nature Magazine https://t.co/lHxeFJqriM

[Jayson Jeganathan @jaysonjeg]

Wow. Most recent openAI model o3 smashes the prev leaderboard for ARC-AGI reasoning challenge. It is also now the 175th best coder in the world (CodeForces challenge), and can solve 25% of hard-for-humans FrontierMath Qs (up from 2%). What does this all mean?

[Riley Goodside @goodside]

ARC-AGI scores for past five years of OpenAI models (updated w/ release dates)

[Jayson Jeganathan @jaysonjeg]

Hi friends, find me at the other place on https://t.co/mbVr0nd3L8

[Jayson Jeganathan @jaysonjeg]

https://t.co/mbVr0ncvVA
I'm on bluesky !

[Tyler Sloan @quorumetrix]

I've combined some of these together into a new #neuro #visualization "In the eye of a fly":
Using the @FlyWireNews visual system wiring diagram, #Brian2 spiking #neuron simulator, and #blender. Information flow through the chiasms, across a topographic map.

[Jayson Jeganathan @jaysonjeg]

@PessoaBrain My priors had brains quite close to artificial neural networks. Guess that's why I'm surprised. Also it's astounding that neurons can learn and rewire on such short time frames

[Jayson Jeganathan @jaysonjeg]

@PessoaBrain Yea this seems to tell us one way that brains work differently from neural networks

[Jayson Jeganathan @jaysonjeg]

Wow

[Luiz Pessoa @PessoaBrain]

𝗛𝗼𝘄 𝘀𝗵𝗼𝘂𝗹𝗱 𝗼𝗻𝗲 𝗱𝗼 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 𝗻𝗲𝘂𝗿𝗼𝘀𝗰𝗶𝗲𝗻𝗰𝗲??
This way! Every neuro program should just make this required reading and teach students how to do outstanding science like this.
https://t.co/cIjGhFzWDN

[Jayson Jeganathan @jaysonjeg]

@DrYohanJohn In original transformer paper, it was for translation. The Wq could be applied to an English token, and the Wk to a Spanish token. In the cross attention layers of multimodal foundation models, Wq and Wk could be applied to text and visual input respectively

[Jayson Jeganathan @jaysonjeg]

@DrYohanJohn It's been much nicer having this kind of detailed science discussion than the usual Twitter storm and doom scrolling :)