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March 26, 2016
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1 Introduction



Agnosia ( a-gnosis , or loss 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.

'''Name''' '''Description
Alexia Inability to recognize text.
Akinetopsia The loss of motion perception.
Alexithymia - > Amusia or Receptive amusia - > Anosognosia - > Apperceptive agnosia - > Apraxia - > Associative agnosia - > Auditory agnosia - > Autotopagnosia parietal part of the posterior thalmic radiations. >- > Color agnosia - > Cortical deafness - > Finger agnosia - > Form agnosia - > Integrative agnosia - > Mirror agnosia - > Pain agnosia - > Phonagnosia - > Prosopagnosia - > Semantic agnosia - > Simultanagnosia - > Social emotional agnosia - > Somatosensory agnosia - > Tactile agnosia - > Time agnosia - > Topographical agnosia - > Verbal auditory agnosia - > Visual agnosia - > Visual verbal agnosia Difficulty comprehending the meaning of written words. The capacity to read is usually intact but comprehension is impaired.

Agnosia can result from strokes, dementia, or other neurological disorders. It may also be trauma-induced by a head injury, brain infection, or hereditary. Some forms of agnosia have been found to be genetic.

Patients who experience dramatic recovery from blindness experience significant to total Agnosia.

For all practical purposes, there is no direct cure. Patients may improve if information is presented in other modalities than the damaged one. Different types of therapies can can help to reverse the effects of Agnosia. In some cases, occupational therapy or speech therapy can improve agnosia, depending on its etiology.

  • Apraxia

  • Auditory agnosia

  • Types and brain areas

  • Total Recall: Memory Requires More than the Sum of Its Parts |accessdate=2007-06-05|publisher= Scientific American

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "agnosia".

Last Modified:   2010-12-02

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