Cognitive neuroscience of visual object recognition
Agnosia is a rare occurrence and can be the result of a stroke, dementia, head injury, brain infection, or hereditary.
Apperceptive agnosia is a deficit in object perception creating an inability to understand the significance of objects.
Similarly, associative visual agnosia is the inability to understand the significance of objects; however, this time the deficit is in semantic memory. Both of these agnosias can affect the pathway to object recognition, like Marr's Theory of Vision. More specifically unlike apperceptive agnosia, associative agnosic patients are more successful at drawing, copying, and matching tasks; however, these patients demonstrate that they can perceive but not recognize.
Integrative agnosia(a subtype of associative agnosia) is the inability to integrate separate parts to form a whole image. With these types of agnosias there is damage to the ventral (what) stream of the visual processing pathway.
Object orientation agnosia is the inability to extract the orientation of an object despite adequate object recognition. With this type of agnosia there is damage to the dorsal (where) stream of the visual processing pathway.
This can affect object recognition in terms of familiarity and even more so in unfamiliar objects and viewpoints.
A difficulty in recognizing faces can be explained by prosopagnosia. Someone with prosopagnosia cannot identify the face but is still able to perceive age, gender, and emotional expression. The brain region that specifies in facial recognition is the fusiform face area. Prosopagnosia can also be divided into apperceptive and associative subtypes. Recognition of individual chairs, cars, animals can also be impaired; therefore, these object share similar perceptual features with the face that are recognized in the fusiform face area.
Agnosía
A young woman, Joana Prats, suffers from agnosia, a strange, primary visual disease that is one of the neuropsychological disorders of perception. Although her eyes and ears are in perfect condition, her brain is not able to correctly interpret the stimuli it receives. Joana is the only person to know an industrial secret left behind by her late father and becomes the victim of a sinister plan to extract this information. Her captors plan to use her sensory condition to help extract the information that they so desperately want.Roxbury Pictures shot the film in December 2009 at Barcelona and Parc Nacional d'Aigüestortes Estany de Sant Maurici in Province of Lleida. It was the second film directed by producer Eugenio Miro and based on a screenplay by Antonio Trashorras. In the leads in the thriller acts Eduardo Noriega, Martina Gedeck, Bárbara Goenaga and Jack Taylor in his second feature film under Eugenio Mira.