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Agnosia
Book chapter

Agnosia

Daniel Tranel and Antonio R Damasio
International Encyclopedia of the Social & Behavioral Sciences, pp.440-443
Elsevier Ltd, Second Edition
2015
DOI: 10.1016/B978-0-08-097086-8.56001-2

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Abstract

Agnosia is a fascinating condition in which, as a consequence of acquired brain damage, patients lose the ability to recognize familiar stimuli, despite normal perception of those stimuli. For example, when encountering the faces of familiar persons such as family members or close friends, a patient with agnosia is unable to identify those persons, or even to recognize that they are familiar. Agnosia can affect recognition of stimuli in any sensory modality, including visual, auditory, and tactile, although visual agnosia is the most common form of the disorder. Careful scientific study of agnosia has provided many important new insights into the manner in which the human brain acquires, maintains, and utilizes various types of knowledge.
Brain dramage Agnosia Recognition Stimuli

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