Abstract
Looming objects pose potential threats to an organism, making it advantageous for sensory systems to detect such events rapidly and efficiently. Evidence from nonhuman primates would further suggest an evolved capacity to integrate looming multisensory (auditory-visual) objects. Whether such extends to humans and what brain mechanisms contribute to such effects remain unknown. Here, we studied the impact of looming sounds on visual cortex excitability as a potential basis for rapid and efficient detection of approaching objects. Across 3 experiments, we varied sound category (looming (L), receding (R), and stationary (S)) and used phosphene detection following occipital TMS at sound offset as an index of visual cortex excitability.
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