SUPPLEMENTAL MATERIAL for the article entitled "Integration of Audiovisual Motion in Dorsolateral Prefrontal Cortical Neurons" (Karimi et al. 2025)

We recorded single neurons in macaque dorsolateral prefrontal cortex during visual, auditory, and audiovisual motion. Nearly half of responsive neurons were multisensory and a third displayed significant super- or sub-additive interactions, while ensemble activity reliably decoded stimulus modality. These findings provide the strongest evidence to date that DLPFC performs rapid, nonlinear audiovisual integration, extending multisensory computations beyond classical posterior regions into the prefrontal circuits that support cognition.