, 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
neurological illness, particularly after damage to the
, which is part of the
| '''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
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
- Total Recall: Memory Requires More than the Sum of Its Parts |accessdate=2007-06-05|publisher=