In the brain, objects seen and imagined follow the same neural path

New research reveals that the brain uses the same neurons and neural code to process both seen and imagined objects. Scientists recorded activity from over 700 individual neurons in epilepsy patients who had electrodes implanted for medical reasons. The study found that when participants either viewed or imagined objects, the same neural pathways were activated, demonstrating a shared mechanism for perception and imagination. This discovery, published in the journal Science, provides direct neural evidence that visual perception and mental imagery are closely linked at the cellular level. Experts note that this insight advances understanding of how the brain constructs mental images, allowing people to visualize objects not currently in view or to combine familiar elements into novel forms, such as imagining a unicorn. The findings also shed light on the brain’s ability to augment incomplete visual information by mentally filling in unseen parts of objects. Beyond deepening scientific knowledge of brain function, the research has practical implications. It may aid the development of computer models that simulate human vision and vision disorders, potentially improving prosthetic devices designed to restore sight. Moreover, understanding the neural basis of imagination could inform strategies for cognitive training and rehabilitation, including interventions aimed at reducing dementia risk through mental exercise. The study leveraged a unique opportunity to monitor single-neuron activity in human brains, a method rarely possible outside clinical contexts. By bridging the gap between perception and imagination at the neural level, this work opens new avenues for exploring how the brain integrates sensory input with internal representations, ultimately enriching both neuroscience research and clinical applications.