Agnosias

Agnosias are severe deficits in ability to perceive sensory information that are often caused by lesions. Psychology research in this area is usually case studies of people who have been in accidents that caused lesions on their brain and the agnosia to develop.


Some examples of agnosias: 

• Similtagnosia: inability to pay attention to more than one object at a time
• Spatial agnosia: severe difficulty in everyday environments (getting lost in your own house) 
• Prospagnosia: inability to recognize human faces
• Auditory agnosia: no recognition of music melodies, even from your own collection 
• Apperceptive agnosia: no ability to recognize familiar objects  
• Akinetopsia: loss of motion perception (a woman in Zurich saw cars as a series of frames—she was afraid to cross the street).