Psychology 9-1 GCSE - 

4.1.4 - Understand the impact of neurological damage on cognitions and behaviour, including:

a) The term 'visual agnosia' -

c) The symptoms of visual agnosia - 

This is the inability of the brain to recognise or understand visual stimuli. A person with visual agnosia has otherwise normal visual functioning and can see but is unable to interpret or recognise what they are seeing. It is usually found in adults who have had brain damage. The symptoms can be, inability to recognise and object by its shape, difficulty identifying objects that look similar in shape, difficulty with line drawings and recognising objects shown from uncommon views. 

b) The term 'prosopagnosia' - 

d) The symptoms of prosopagnosia - 

This is known as 'face blindness'. It is a disorder in which people are unable to recognise faces. Those with the condition can see individual parts of a face but can't process the features together as a whole. Therefore they can't commit any faces to memory, not even their own face. This can be caused by brain injury or it can be inherited. 

e) The impact of damage to the prefrontal cortex - 

The prefrontal cortex is in charge of social emotion, so damage to it can have effects on someones sympathy and morals. It effects our understanding of right and wrong. Studies have suggested that people with damage to the prefrontal cortex are a lot more likely to sacrifice someone for the 'greater good'.