Somatoparaphrenia is a type of monothematic delusion where one denies ownership of a limb or an entire side of one's body. Even if provided with undeniable ...SomatoparaphreniaFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchDelusioninvolvingdenialofownershipofalimbMedicalconditionSomatoparaphreniaSpecialtyPsychiatrySomatoparaphreniaisatypeofmonothematicdelusionwhereonedeniesownershipofalimboranentiresideofone'sbody.Evenifprovidedwithundeniableproofthatthelimbbelongstoandisattachedtotheirownbody,thepatientproduceselaborateconfabulationsaboutwhoselimbitreallyisorhowthelimbendedupontheirbody.[1][2]Insomecases,delusionsbecomesoelaboratethatalimbmaybetreatedandcaredforasifitwereaseparatebeing.[1]Somatoparaphreniadiffersfromasimilardisorder,asomatognosia,whichischaracterizedaslossofrecognitionofhalfofthebodyoralimb,possiblyduetoparalysisorunilateralneglect.[3]Forexample,asomatognosicpatientsmaymistaketheirarmforthedoctor's.However,theycanbeshowntheirlimbandthiserroristemporarilycorrected.[1]Somatoparaphreniahasbeenreportedtooccurpredominatelyintheleftarmofone'sbody,[4]anditisoftenaccompaniedbyleft-sidedparalysisandanosognosia(denialorlackofawareness)oftheparalysis.Thelinkbetweensomatoparaphreniaandparalysishasbeendocumentedinmanyclinicalcases,[5]andwhilethequestionarisesastowhetherparalysisisnecessaryforsomatoparaphreniatooccur,anosognosiaisnot,asdocumentedbycaseswithsomatoparaphreniaandparalysiswithnoanosognosia.[6]Contents1Causes2Diagnosis3Treatment4Seealso5ReferencesCauses[edit]Ithasbeensuggestedthatdamagetotheposteriorcerebralregions(temporoparietaljunction)ofthecortexmayplayasignificantroleinthedevelopmentofsomatoparaphrenia.[7][8]However,morerecentstudieshaveshownthatdamagetodeepcorticalregionssuchastheposteriorinsula[9]andsubcorticalstructuressuchasthebasalganglia,[10]thethalamusandthewhitematterconnectingthethalamustothecortexmayalsoplayasignificantroleinthedevelopmentofsomatoparaphrenia.[11]Ithasalsobeensuggestedthatinvolvementofdeepcorticalandsubcor