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Farzin Hajebrahimi

@farzinha.bsky.social
35 followers 150 following 9 posts

Enthusiastic about “how” 🧠 works. BME Postdoc @NJIT

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Reposted by Farzin Hajebrahimi
Michael W. Cole @mwcole.bsky.social · 28/04/2026
Why do our visual systems have “shortcut” connections (V1-V4)? What do they add beyond the classic hierarchical (V1-V2-V3-V4) pathway? 

The lab’s latest study takes activity flow modeling to the next level to answer this question, led by @alextzalav.bsky.social www.biorxiv.org/content/10.6... 1/n
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Reposted by Farzin Hajebrahimi
Michael W. Cole @mwcole.bsky.social · 28/03/2026
Inspired by Edinburgh’s legacy of big ideas (e.g., Hume), on a train leaving the city, I crafted a proposal for a book about big ideas in network neuroscience—how brain activity flows generate representations that together compose our minds. The rest is history, and this new book: shorturl.at/3p100
press.princeton.edu
Brain Flows
A pioneering theory of how brain network flows compose the neural symphonies that make us who we are
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
A huge thank you to my incredible mentors, Tara Alvarez and @mwcole.bsky.social, for their invaluable support on this work! Please read the full paper here: doi.org/10.1162/NETN... 8/8
doi.org
Distributed cortical network dynamics of binocular convergent eye movements in humans
Abstract. Neuroimaging studies in humans have localized brain functions to specific brain regions, but a recent shift toward distributed network-based models of brain function promises deeper insights...
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
Understanding these distributed pathways provides a new lens for clinical conditions like concussion-related oculomotor dysfunction. It’s not just about one damaged region; it’s about how the whole network communicates. 7/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
By testing participants across separate scanning sessions, we found that these network signatures are stable. The brain's intrinsic architecture for convergent eye movements is a robust blueprint that reliably supports functional responses. 6/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
The Heavy Lifters: VIS and DAN 🏋️ Which networks drive this flow? Our results showed that the Visual and Dorsal Attention networks dominate the propagation of signals during convergent eye movements. 5/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
We focused on the Cortical Circuitry of Convergence, including the primary visual cortex and frontal/parietal and supplementary eye fields. When we excluded these core regions from the model's "source," the rest of the brain's network connectivity accurately regenerated their activity. 4/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
We used Activity Flow Mapping to model how task activations arise from the propagation of activity across distributed connectivity pathways and showed that activity-flow-generated activation patterns closely match the actual task activations during convergent eye movements. 3/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
Coordinated activity across both eyes is essential for maintaining single visual perception, supporting everyday activities such as reading and interacting with digital screens. Impairments in this system can result in significant functional limitations, also seen in neurological disorders. 2/8
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Farzin Hajebrahimi @farzinha.bsky.social · 25/02/2026
Our recent study, "Distributed cortical network dynamics of binocular convergent eye movements in humans" is out in Network Neuroscience, where we move beyond simple brain mapping to show that binocular convergence is driven by the flow of activity across distributed neural networks. 1/8
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Reposted by Farzin Hajebrahimi
Nature Reviews Neurology @natrevneurol.nature.com · 04/12/2025
New online! Characteristics and mechanisms of cognitive impairment in Parkinson disease
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Characteristics and mechanisms of cognitive impairment in Parkinson disease
Nature Reviews Neurology, Published online: 03 December 2025; doi:10.1038/s41582-025-01163-xCognitive impairment is one of a range of non-motor symptoms that people with Parkinson disease (PD) can experience in addition to the hallmark motor symptoms of the disease. In this Review, Oikonomou et al. outline the epidemiology and natural history of cognitive decline in PD and related disorders, and discuss the key underlying pathophysiological factors and mechanisms.
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Reposted by Farzin Hajebrahimi
Ravi Mill @ravimill.bsky.social · 19/11/2025
Excited to see our paper with @mwcole.bsky.social finally out in peer-reviewed form @natcomms.nature.com! We examine how the human brain learns new tasks and optimizes representations over practice…1/n
Schematic depicting cortical-subcortical interactions during multi-task learning
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Reposted by Farzin Hajebrahimi
Michael W. Cole @mwcole.bsky.social · 14/09/2025
Lab’s latest is out in Imaging Neuroscience, led by Kirsten Peterson: “Regularized partial correlation provides reliable functional connectivity estimates while correcting for widespread confounding”, where we demonstrate a major improvement to standard fMRI functional connectivity (correlation) 1/n
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Farzin Hajebrahimi @farzinha.bsky.social · 21/12/2024
Stories no one had heard in years…
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Reposted by Farzin Hajebrahimi
Michael W. Cole @mwcole.bsky.social · 03/12/2024
“Cognitive flexibility as the shifting of brain network flows by flexible neural representations”, a solo paper by yours truly, making the case that brain activity flow shifts are essential to mental flexibility (and quite interesting too!) Open access: www.sciencedirect.com/science/arti...
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Reposted by Farzin Hajebrahimi
Michael W. Cole @mwcole.bsky.social · 05/11/2024
Lab’s latest at PLOS Comp Biol, led by Carrisa Cocuzza: “Distributed network flows generate localized category selectivity in human visual cortex”. This one changed how I think the brain works! Even "localized" functions are likely generated by distributed processes doi.org/10.1371/jour...
doi.org
Distributed network flows generate localized category selectivity in human visual cortex
Author summary A fundamental question in neuroscience has persisted for over a century: to what extent do distributed processes drive brain function? The existence of category-selective regions within...
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