Tootfinder

Manifolds and Modules: How Function Develops in a Neural Foundation Model
Johannes Bertram, Luciano Dyballa, T. Anderson Keller, Savik Kinger, Steven W. Zucker
https://arxiv.org/abs/2512.07869 https://arxiv.org/pdf/2512.07869 https://arxiv.org/html/2512.07869
arXiv:2512.07869v1 Announce Type: new
Abstract: Foundation models have shown remarkable success in fitting biological visual systems; however, their black-box nature inherently limits their utility for under- standing brain function. Here, we peek inside a SOTA foundation model of neural activity (Wang et al., 2025) as a physiologist might, characterizing each 'neuron' based on its temporal response properties to parametric stimuli. We analyze how different stimuli are represented in neural activity space by building decoding man- ifolds, and we analyze how different neurons are represented in stimulus-response space by building neural encoding manifolds. We find that the different processing stages of the model (i.e., the feedforward encoder, recurrent, and readout modules) each exhibit qualitatively different representational structures in these manifolds. The recurrent module shows a jump in capabilities over the encoder module by 'pushing apart' the representations of different temporal stimulus patterns; while the readout module achieves biological fidelity by using numerous specialized feature maps rather than biologically plausible mechanisms. Overall, we present this work as a study of the inner workings of a prominent neural foundation model, gaining insights into the biological relevance of its internals through the novel analysis of its neurons' joint temporal response patterns.
toXiv_bot_toot

Comprei umas coisas de mercado pelo Ifood e agora vieram me entregar as compras de outra pessoa. 😒

Underestimates in global warming pose major climate and financial risks, report shows #climate

Underestimates in global warming pose major climate and financial risks, report shows
Policymakers and financial institutions are underestimating climate risks that could undermine the global financial system, according to a new report from the Institute and Faculty of Actuaries (IFoA) and University of Exeter.

É só por aqui ou o prazo de entrega da maior parte das coisas via Ifood aumentou absurdamente? Tipo mais de uma hora e meia de prazo em quase todas lojas.

🇺🇦 #NowPlaying on BBCRadio3's #ThroughTheNight
Metamorphosis & Heinrich Ignaz Franz von Biber:
🎵 Battalia a 10 in D major
#Metamorphosis #HeinrichIgnazFranzvonBiber
https://open.spotify.com/track/4JmryxoIFohb54FqYeJh7m