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BrainLoRA adapts 100B+ multimodal backbones for brain encoding via PEFT

AI summary

An arXiv paper submitted on 19 October 2026, "Scaling Parameter-Efficient Fine-Tuning for Brain Encoding" by Zhuofan Josh Ying, Nikolaus Kriegeskorte, Hossein Adeli and six co-authors, proposes adapting very large pretrained multimodal backbones to brain encoding with low-rank adapters (LoRA) plus a lightweight readout. The authors say the approach scales to backbones of up to 104B parameters, which they describe as the largest model adapted for brain encoding to their knowledge, and that it consistently improves performance across nine multimodal backbones. They report that BrainLoRA achieves the best published result on the Algonauts 2025 Challenge on the same Qwen3-Omni backbone used by the prior state of the art, and that an ensemble of 200+ adapted models built with a multi-LoRA kernel ranks first on the public Algonauts post-challenge leaderboard at the time of writing. These benchmark claims are self-reported and not independently verified in the supplied material.

In-depth insight

If the authors' results hold, PEFT could let brain-encoding research reuse very large pretrained backbones despite scarce and costly neural data, lowering the compute and data barrier for the field.

Computer Science > Machine Learning

arXiv:2610.26802 (cs)

[Submitted on 19 Oct 2026]

Title:Scaling Parameter-Efficient Fine-Tuning for Brain Encoding

Authors:Zhuofan Josh Ying, Guanglong Sun, Nolan Ho, Kieran Liu, Rui Yang, Andrew Chen, Nikolaus Kriegeskorte, Pony Ma, Hossein Adeli

View a PDF of the paper titled Scaling Parameter-Efficient Fine-Tuning for Brain Encoding, by Zhuofan Josh Ying and 8 other authors

#BrainLoRA#Qwen3-Omni#Algonauts 2025 Challenge#arXiv#LoRA#Zhuofan Josh Ying#Nikolaus Kriegeskorte#Hossein Adeli

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