A specific form of associative visual agnosia is known as prosopagnosia. Alternate cues may be particularly useful to an individual with environmental agnosia or prosopagnosia. Music agnosia, an auditory agnosia, is a syndrome of selective impairment in music recognition. Associative visual agnosia is a form of visual agnosia. Broadly, visual agnosia is divided into apperceptive and associative visual agnosia. In contrast, individuals with associative visual agnosia experience difficulty when asked to name objects. Patients who experience dramatic recovery from blindness experience significant to total agnosia. There are two broad categories of visual object agnosia&colon; apperceptive and associative. Patients that suffer from visual agnosia are unable to identify visually presented objects. There are two types of visual agnosia&colon; apperceptive agnosia and associative agnosia. Loss of object recognition is called "visual object agnosia". C.K. was a 33-year old man with visual object agnosia acquired after a vehicular accident. Visual object agnosia (or semantic agnosia) is the most commonly encountered form of agnosia. Impairment at this stage would be consistent with apperceptive agnosia.