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.