6.3.1 Parallel Processing In The Visual Cortex 2 Flashcards
In one study, investigators examined 14 people who had been born with cataracts in both eyes but had them repaired it ages 2 to 6 months. Although they developed nearly normal vision, they had subtle lingering problems in recognising slight ____ between one face and another.
differences
The ability to recognise faces continues developing gradually all the way into ____.
adolescence
Precision is best for faces similar to familiar faces. Your brain learns the “____” of the faces it sees and then detects small deviations from the average.
average
Face recognition depends on several brain areas, including parts of the occipital cortex, the anterior temporal cortex, the prefrontal cortex, and the fusiform gyrus of the inferior temporal cortex, especially in the ____ ____.
right hemisphere
Damage to any of these areas leads to ____, meaning the inability to recognise faces.
prosopagnosia
Some individuals are poor throughout life at recognising faces, because they were born with a ____ of connections to and from the fusiform gyrus.
shortage
People with prosopagnosia can read, so visual acuity is not a problem. They recognise peoples voices so the problem is not memory. The problem is not vision in general, but something that relates ____ ____.
specifically to faces
When people with prosopagnosia look at a face, they can describe whether a person is old or young, male or female, but they cannot ____ the person.
identify
Although neurons in many parts of the visual system show some response to changing colour, one brain area is particularly important, known as ____ ____.
area V4
The apparent colour of an object depends not only on the light reflected from that object, but also how it ____ with objects around it.
compares
The responses of cells in V4 correspond to the apparent or perceived colour of an object, which depends on the ____ ____.
total context
After damage to area V4, people do not become colourblind, but they lose ____ ____. Colour constancy is the ability to recognise something as being the same colour despite changes in lighting.
colour constancy
Viewing a complex moving object activates many brain areas spread among all ____ ____ of the cerebral cortex.
four lobes
Two main areas that are specially activated by motion are area MT (for ____ ____ ____), also known as area V5, and an adjacent region, area MST (____ ____ ____ ____).
middle temple cortex : medial superior temporal cortex
Areas MT and MST received input mostly from the magnocellular path, which detects overall patterns, including movement over large areas of the visual field. Given that the magnocellular path is ____, MT is also ____.
colour-insensitive