[2606.13801] Neural Variability Enhances Artificial Network Robustness
[Submitted on 11 Jun 2026]
Title:Neural Variability Enhances Artificial Network Robustness
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Abstract:Neural responses in cortex exhibit substantial trial-to-trial variability in response to repeated stimuli, while peripheral sensory neurons respond far more consistently, leading many to wonder whether stochasticity may carry meaning. Existing work has argued that noise and signal correlations may be optimized for discrimination in animals, whereas artificial neural network (ANN) studies have shown similar benefits of noise in machine learning tasks, although most ANN work has neglected the effects of correlations. Here we investigate whether correlated noise improves the robustness of artificial neural networks to adversarial attacks and naturalistic image modifications. Using the covariance of activations under modified versus clean inputs, we find that structured noise may significantly improve network robustness. Robustness to naturalistic image modifications benefits most from structure, but this structure transfers poorly across modification types. In contrast, noise structure from adversarial attacks can generalize to other kinds of attacks. These results suggest that structured noise in ANN activations generally improves robustness, establishing a biologically plausible strategy for creating robust artificial neural networks that only relies on local information.
Subjects:
Machine Learning (cs.LG); Neurons and Cognition (q-bio.NC)
Cite as: arXiv:2606.13801 [cs.LG]
(or arXiv:2606.13801v1 [cs.LG] for this version)
https://doi.org/10.48550/arXiv.2606.13801
arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Kameron Decker Harris [view email] [v1] Thu, 11 Jun 2026 18:15:39 UTC (8,269 KB)
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