Discover how the brain interprets sensory information through neuroscience research on perception.
His name is A.D., 59 years old. A right-handed man with no remarkable medical history, fully autonomous, no psychiatric scars or developmental concerns. Just an ordinary individual until one day, something quietly unraveled behind the curtain of appearances. Since a minor stroke, faces have changed in nature. Every time he sees one, a strange asymmetry…
Every time he closes his eyes, the image of his father appears, a stern face etched into childhood memory. And with it, a harsh, violent voice. No one is speaking. He’s alone in the room. But he hears it clearly, insults, accusations, phrases that seem to emerge not from the outside world, but directly from…
Our perception of space feels fluid and seamless. We instantly detect what happens on our left and right, trace visual trajectories, and identify objects in complex environments. Beneath this apparent unity, however, lies a highly structured bilateral brain organization: the left hemisphere processes input from the right visual field, and the right hemisphere, from the…
Each summer, experienced hikers lose their way in forests or mountains, sometimes just a few hundred meters from a marked trail. Though these disorientations are often temporary, they can quickly turn into life-threatening situations. How can the brain, supposedly capable of reading a map, following a compass, or navigating by the sun, go so drastically…
One evening, in the waiting room of a hospital, a ten-year-old girl clutched her mother’s hand with unusual insistence. She stared at her mother’s face, then quickly looked away, as if something no longer made sense.“Your head is tiny… and I think my arms are getting longer,” she whispered, caught between fear and amazement. Her…
Mr. L., 56, lost his left leg in a motorcycle accident. Just days after the amputation, he began experiencing intense, localized pain in his left foot, a foot that no longer existed. He described it as a burning sensation, sometimes cramping, as though his toes were painfully curled. No topical treatment provided relief. When asked…
He saw the eyes, the noses, the mouths. He could draw them with almost clinical precision, each line accurate, every curve exact. And yet, what he sketched held no meaning. He didn’t recognize what he had just drawn. Faces no longer spoke to him. They weren’t blurred, on the contrary, he saw them all too…
We tend to believe that our perception of color is universal: blue is blue, and green is green for everyone. However, what we see is shaped by our language, culture, and environment. Among the Himba, a tribe living in Namibia, the color spectrum is not divided in the same way as in Western languages. Their…
Auditory attention is a remarkable feat of our brains, striking a delicate balance between focus and sensory filtering. In a bustling café, surrounded by lively conversations and the clatter of cups, we manage to follow a single discussion while ignoring the background chatter. However, what happens when, within this tangled web of sound, a familiar…