Press Release Archive

New finding---The Parietal lobe is involved in visual processing!

Press Release Archive: "Now you see it, now you don’t: ‘Change blindness’ isn’t magic

A team of scientists at UCL (University College London) has discovered why we often miss major changes in our surroundings - such as a traffic light turning green when we’re listening to the radio. Our inability to notice large changes in a visual scene is a phenomenon often exploited by magicians - but only now can scientists put their finger on the exact part of the brain that is so often deceived."

The UCL team shows, in a research paper published in the September issue of the journal Cerebral Cortex (which goes online on 24th August) that the part of the brain called the parietal cortex, the area responsible for concentration, is also critical to our ability to detect changes. The exact critical spot lies just a few centimetres above and behind the right ear – the area many people scratch when concentrating....

Professor Lavie said: “Because the parietal lobe is not part of the visual cortex it was at first surprising to find that activity in the parietal lobe is critical for visual awareness. We have always known that the parietal cortex was responsible for concentrating. But it was a surprise to find out it is also important for detecting visual changes in a scene. The finding that this region of the brain has both these functions, concentration and visual awareness, explains why we can be so easily deceived by, say, a magicians’ trick. When we’re concentrating so hard on something that our processing capacity is at its limits, the parietal cortex is not available to pay attention to new things and even dramatic changes can go unnoticed. If you’re concentrating on what the magician’s left hand is doing, you won’t notice what the right hand is doing.”