Visual agnosia is an impairment in recognition of visually presented objects. It is not due to a deficit in vision language, memory, or intellect.VisualagnosiaFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchVisualagnosiaisanimpairmentinrecognitionofvisuallypresentedobjects.Itisnotduetoadeficitinvision(acuity,visualfield,andscanning),language,memory,orintellect.[1]Whilecorticalblindnessresultsfromlesionstoprimaryvisualcortex,visualagnosiaisoftenduetodamagetomoreanteriorcortexsuchastheposterioroccipitaland/ortemporallobe(s)inthebrain.[2]Therearetwotypesofvisualagnosia:apperceptiveagnosiaandassociativeagnosia.Recognitionofvisualobjectsoccursattwoprimarylevels.Atanapperceptivelevel,thefeaturesofthevisualinformationfromtheretinaareputtogethertoformaperceptualrepresentationofanobject.Atanassociativelevel,themeaningofanobjectisattachedtotheperceptualrepresentationandtheobjectisidentified.[2]Ifapersonisunabletorecognizeobjectsbecausetheycannotperceivecorrectformsoftheobjects,althoughtheirknowledgeoftheobjectsisintact(i.e.theydonothaveanomia),theyhaveapperceptiveagnosia.Ifapersoncorrectlyperceivestheformsandhasknowledgeoftheobjects,butcannotidentifytheobjects,theyhaveassociativeagnosia.[3]Contents1Symptoms2Pathophysiology3Diagnosis3.1Classification3.1.1Categoriesandsubtypesofvisualagnosia3.1.1.1Subtypesofassociativevisualagnosia4PatientCK4.1Background4.2Associativevisualagnosia4.3Evidencefordoubledissociationbetweenfaceandobjectprocessing5Inpopularculture6Seealso7References8FurtherreadingSymptoms[edit]Whilemostcasesofvisualagnosiaareseeninolderadultswhohaveexperiencedextensivebraindamage,therearealsocasesofyoungchildrenwithlessbraindamageduringdevelopmentalyearsacquiringthesymptoms.[4]Commonly,visualagnosiapresentsasaninabilitytorecognizeanobjectintheabsenceofotherexplanations,suchasblindnessorpartialblindness,anomia,memoryloss,etc..Othercommonmanifestationsofvisualagnosiathataregenerallytestedforincludedifficultyidentifyingobjectsthatlooksimilarinshape,difficul