Mining Posterior Cingulate

in Danish Functional brain imaging studier kortlgger funktion til hjerneomrder. Vi har anvendt automatisk usuperviseret textanalyse p PubMed databasen med henblik p at finde hvilke funktioner bliver associeret med et hjerneomrde posterior cingulate cortex (PCC). PCC er specielt interessant for neurovidenskablig data mining da dens funktion ikke er klarlagt. En sgning i Pubmed begrnset til artikler som havde bde PCC and functional brain imaging som keywords returnerede 271 abstracts. Non-negative matrix factorization blev brugt til at identificere hovedkontekster i form af clusters af ord som hyppigt forekommer sammen i disse abstracts. Vi fandt at hukommelse, Alzheimer’s disease og smerte er hovedkonteksterne i de artikler som nvner PCC. De frste to hovedkontekster er i overenstemmelse med resultater fra manuelle reviews som forbinder PCC med episodisk genkaldelse og tidlige metabolismndringer i Alzheimer’s disease. Yderligere finder vi at smerteog hukommelsesrelaterede aktiveringer er rumligt adskilte. Hukommelsesrelaterede aktiveringer befinder sig oftest inferiort og posteriort i PCC mens smerte-relaterede aktiveringer er oftest fundet anteriort i PCC. Finn Årup Nielsen, Daniela Balslev 1 July 7, 2004

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