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Agnosia

For the Spanish film, see Agnosia (film). For the moth genus, see Agnosia (moth).
Agnosia
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Agnosia causes loss of the ability to recognize or comprehend the meaning of objects even with intact senses.
SpecialtyPsychiatry, Neurology, Neuropsychology
Picture of the ventral and dorsal streams. The ventral stream is depicted in purple and the dorsal stream is depicted in green.

Agnosia is a neurological disorder characterized by an inability to process sensory information. Often there 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.[1] It is usually associated with brain injury or neurological illness, particularly after damage to the occipitotemporal border, which is part of the ventral stream.[2] Agnosia only affects a single modality,[3] such as vision or hearing.[4] More recently, a top-down interruption is considered to cause the disturbance of handling perceptual information.[5]

  1. ^ "Agnosia". BrainFacts.org. Retrieved 15 August 2023.
  2. ^ Kolb, Bryan; Whishaw, Ian Q. (3 March 2003). Fundamentals of Human Neuropsychology. Worth Publishers. ISBN 978-0-7167-5300-1.
  3. ^ Burns, MS (2004). "Clinical management of agnosia". Top Stroke Rehabil. 11 (1): 1–9. doi:10.1310/N13K-YKYQ-3XX1-NFAV. PMID 14872395. S2CID 5758683. Archived from the original on 2013-01-28.
  4. ^ "NINDS Agnosia Information Page". National Institute of Neurological Disorders and Stroke. Archived from the original on 2013-01-27. Retrieved 2012-03-28.
  5. ^ "Agnosia". Archived from the original on 2017-05-26. Retrieved 2016-12-16.

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