Review recasts amygdala, perirhinal cortex as frequent rivals

A new review in Neuroscience & Biobehavioral Reviews argues that the amygdala and perirhinal cortex don’t simply work hand in hand when mammals process information. Instead, across evidence from rats, cats, and people, the two brain regions can either cooperate or compete, depending on the task, the sensory input, and whether the situation feels safe or threatening. The paper, by Nathan M. Holmes, Melie Talaron, and A. Simon Killcross, builds on earlier work showing that the basolateral amygdala tends to dominate learning under danger, while the perirhinal cortex is more important when animals are processing neutral sensory relationships in safer settings. (sciencedirect.com)

Why it matters: For veterinary professionals, this is basic science rather than a clinical practice change, but it sharpens how the field thinks about emotion, perception, and memory in animals. The review suggests that behavioral responses may reflect a shifting balance between emotion-linked and sensory-associative circuits, not a single “fear center.” That framing could be useful for clinicians, behavior specialists, and researchers studying fear, stress, learning, pain-associated memories, or how animals respond differently in calm versus threatening environments. (sciencedirect.com)

What to watch: Expect this framework to inform future animal behavior and translational neuroscience studies, especially work testing how stress state changes which brain systems guide learning and recall. (sciencedirect.com)