|
Rapid Categorization of Natural Face Images in the Infant Right Hemisphere| old_uid | 15582 |
|---|
| title | Rapid Categorization of Natural Face Images in the Infant Right Hemisphere |
|---|
| start_date | 2015/05/04 |
|---|
| schedule | 14h |
|---|
| online | no |
|---|
| location_info | salle 2029 |
|---|
| summary | Human performance at categorizing natural visual images surpasses sophisticated automatic algorithms, but how and when this function arises and develops remain unanswered. We recorded scalp electrical brain activity in 4-6 months infants viewing images of various objects in their natural background at a rapid rate of 6 images/second (6 Hz). Widely variable natural face images appearing every 5 stimuli generated an electrophysiological response over the right hemisphere exactly at 1.2 Hz (6 Hz/5). This face-selective response was absent for phase-scrambled images, showing that it is not due to low-level visual information. These findings indicate that right lateralized face-selective processes emerge well before reading acquisition in the infant brain, who is able to perform figure-ground segregation and generalize face-selective responses across faces varying in size, viewpoint, illumination as well as expression, age and gender. They open an avenue for clarifying the developmental course of natural image categorization in the human brain. |
|---|
| responsibles | Senot |
|---|
| |
|