31. For example, patient DF had lesions to the ventral surface that gave her apperceptive agnosia . 32. In contrast, auditory verbal agnosia has also been documented to present progressively over several years. 33. Music agnosia , an auditory agnosia, is a syndrome of selective impairment in music recognition. 34. Music agnosia, an auditory agnosia , is a syndrome of selective impairment in music recognition. 35. Many of the cases of music agnosia have resulted from surgery involving the middle cerebral artery. 36. Visual agnosia or prosopagnosia were not diagnosed, as the misidentification also took place during phone calls. 37. Although visual agnosia can be general, there exist many variants that impair recognition of specific types. 38. Pick s studies introduced autotopagnosia and other category specific agnosias , such as visual and tactile agnosia. 39. Pick s studies introduced autotopagnosia and other category specific agnosias, such as visual and tactile agnosia . 40. Each patient that suffers from apperceptive agnosia does not have brain damage in exactly the same area.