Hristos Courellis

We’re thrilled to introduce the second cohort of FutureHouse AI-for-Science Independent Postdoctoral Fellows: five exceptional scientists pursuing bold research at the intersection of AI and science. Please join us in welcoming: Hanqing Liu, Alexander Starr, Jeremy Koob, Soojung Yang, and Andrew Lu Starting in September, these Fellows will leverage cutting-edge AI Scientists to advance their projects in genomics, neuroscience, protein design, biophysics, and cancer therapeutics. This year, we're also proud to partner with @KavliFoundation, who is sponsoring one of our Fellows. We’re excited to support this cohort as they pursue ambitious, independent research and help expand what AI can make possible in science. Learn more about the 2026 Fellows and the Fellowship program here: #2026-fellows" target="_blank" rel="nofollow noopener">futurehouse.org/fellowship-pro… #FutureHouse #AiforScience

1/8 Our preprint is now a peer-reviewed paper :) Big thanks to our reviewers who pushed us to examine our results more carefully and Olivier Wyart (headquarter.paris) for the exquisite visual. science.org/doi/10.1126/sc…

Please join us in welcoming the newest residents to the Taylor Family Department of Neurosurgery! PGY1 Residents · Anna Boerwinkle, MD · Hristos Courellis, MD, PhD · Ryan Gensler, MD · Adeesya Gausper, MD PGY2 Resident · Salil Bhole, MD #Match2026 #WashUMedicine

New lab paper! 🧠 Human hippocampal & MTL theta activity is linked to eye movements, but only during memory-guided navigation. Theta is also strongest during longer, more exploratory eye movements. plos.io/4dwJhR8 Huge congrats to @humza_n_zubair & team! 👏

Just released a new preprint about how well the parameterized tests of GR can capture generic beyond-GR violations when viewed in the geometry of waveform space (arxiv.org/pdf/2602.17524)

1/14 Our paper is out in @NatureNeuro! nature.com/articles/s4159… We develop a geometric theory of how neural populations support generalization across many tasks. Led by amazing @AlbertWakhloo @wslatton @ZuckermanBrain @FlatironInst @harvardphysics @KempnerInst

Nature Abstract representations emerge in human hippocampal neurons during inference nature.com/articles/s4158…

Online now: Neural population activity for memory: Properties, computations, and codes dlvr.it/TPyStx

#OnlineFirst: Functional alterations across motor, visual, and attention cerebellar and cortical networks in patients with asymptomatic spinal cord compression. thejns.org/spine/view/jou…

@andreww_lu Very nice

Check out what I’ve been up to for the past four years at Caltech! Exciting road ahead for therapeutic circuits.

Excited to give a talk at @Winter_QBio this Tuesday, 2/18 during session 1! I’ll be discussing our work using spatial transcriptomics to resolve temporal dynamics in the seminiferous epithelial cycle. Come say hello and chat science!

New results for a new year! “Linking neural population formatting to function” describes our modern take on an old question: how can we understand the contribution of a brain area to behavior? biorxiv.org/content/10.110… 🧵1/

@corefpark @ndif_team Awesome work! It may be of interest to you that neural population geometry in the human hippocampus is similarly re-configurable on short timescales using language-based instructions! nature.com/articles/s4158…

Special thanks to @ndif_team for letting us run these experiments remotely! 14/n

New paper! “In-Context Learning of Representations” What happens to an LLM’s internal representations in the large context limit? We find that LLMs form “in-context representations” to match the structure of the task given in context! 1/n

Rarely categorical, always high-dimensional: how the neural code changes along the cortical hierarchy biorxiv.org/content/10.110… #neuiroscience

Our new preprint with S.Yoshida and B.Simons! Led by @ChakraArun, we leverage spatial information to resolve temporal dynamics in spermatogenesis! biorxiv.org/content/10.110… Also check out a complementary preprint by S.Y. and B.S using live imaging! biorxiv.org/content/10.110… (1/10)

1/10 Very excited to announce that my thesis project is now a preprint! We present the first detailed study of mental imagery in human ventral temporal cortex, bringing together the interests of @doristsao and @UeliRutishauser. biorxiv.org/content/10.110…

Zheng et al. show neural evidence for a functional role of phase precession in human episodic memory. nature.com/articles/s4156…

Our new work is out: Spatial dissociation between recognition and navigation in the primate hippocampus | Science Advances science.org/doi/10.1126/sc…

And lastly, I must thank the neurosurgical patients at @CedarsSinai and @UHN , whose boundless generosity with their time and their minds makes our entire research program possible.

Thank you @neurostrow and @FieteGroup for an insightful news and views that perfectly captures the essence of our science! nature.com/articles/d4158…

A bit late to the party, but I’m very excited to share the first publication from my thesis work at @Caltech ! @Nature nature.com/articles/s4158… twitter.com/UeliRutishause…