In the first experiment, two objects always appeared in the same position relative to the room’s boundary; the other two always appeared in the same spot relative to another object acting as a landmark. This image shows the boundary wall and a landmark object. Credit: University of Pennsylvania
Imagine a room or a landscape or a city street. Part of what differentiates that scene from a face or an object is the fact that it has boundaries, and Uni of Pennsylvania researchers Joshua Julian et al aimed to parse out which part of the brain helps perceive those borders. What they learned, through 2 experiments involving transcranial magnetic stimulation, TMS, is that this function falls to the occipital place area, OPA.
The OPA, located near the top of the back of the head, is known for its st...
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