Agnosia

Agnosia (from ancient Greek ἀγνωσία, "ignorance", "absence of knowledge") is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss. It is usually associated with brain injury or neurological illness, particularly after damage to the occipitotemporal border, which is part of the ventral stream. Agnosia only affects a single modality for example vision or hearing may be affected.

Read more about AgnosiaTypes, Assessing Agnosia, Testing For Agnosia, Causes, Treatment, History

Other articles related to "agnosia":

Apperceptive Agnosia
... When referring to apperceptive agnosia visual and object agnosia are most commonly discussed ... This occurs because apperceptive agnosia is most likely to present visual impairments ... However, in addition to visual apperceptive agnosia there are also cases of apperceptive agnosia in other sensory areas ...
Types of Auditory Agnosia - Discriminative
... This type of auditory agnosia is caused by lesions to the right hemisphere of the brain ... Classical (or pure) auditory agnosia is an inability to process environmental sounds, such as animal noises, industrial noises, or the like ... Interpretive or receptive agnosia (amusia) is an inability to understand music ...
Auditory Agnosia
... Auditory agnosia is a form of agnosia that manifests primarily in the inability to recognize or differentiate between sounds ... Persons with auditory agnosia can physically hear the sounds and describe them using unrelated terms, but are unable to recognize them ... Auditory agnosia is caused by damage to the secondary and tertiary auditory cortex of the temporal lobe of the brain ...
Populations Affected By Apperceptive Agnosia - Alzheimer’s Disease
... Visual agnosia (both apperceptive and associative) can be found as prevalent in Alzheimer’s Disease (AD) patients ... Visual agnosia may be present in early stages of AD and can often act as an indicator of AD ... Apperceptive agnosia results from diffuse cortical pathology of AD ...
Agnosia - History - Cases of Famous Patients
... caused Patient DF to develop visual form agnosia ... P suffered from a form of visual agnosia, specifically prosopagnosia ...