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Torowanie percepcyjne i torowanie semantyczne u chorych na stwardnienie rozsiane: czy pamięć utajona jest zachowana?

Author(s): Ewa Małgorzata Szepietowska

Journal: Neuropsychiatria i Neuropsychologia
ISSN 1896-6764

Volume: 3;
Issue: 1;
Start page: 12;
Date: 2008;
Original page

Keywords: memory | implicit memory | semantic priming | perceptual priming | multiple sclerosis

Introduction: Neuropsychological studies on people withneuropsychological symptoms (e.g. memory deficits)indicate dissociation consisting of some deficits in explicit(declarative) memory and absence of difficulties in rememberingand recalling on the priming procedure. In the fewstudies so far of nondeclarative memory in the MS groupit was shown that priming makes possible recollection ofinformation which cannot be remembered intentionally.It is suggested that there is dependence between theimplicit recalling and the clinical factors of MS.The aim of our research was to analyse the effect ofpriming in MS compared to a control group, defininga relation between effects of reminding and kind ofpriming, course of MS and duration of disability.Material and methods: In the research work 27 peoplewith clinically probable MS (multiple sclerosis) and 30people from a control group took part. The level ofprocessing stimulus on the phase of presentation(perceptual versus semantic) and kind of priming(perceptual versus semantic) were manipulated. In thatway there were created 4 kinds of experimental tasks.Results: The people suffering from MS, compared withthe control group, showed significant difficulties in primingtasks which perform perceptual processing in the learningphase and in the recalling phase, and a comparable levelof results in semantic priming. Clinical factors (course ofillness and disease duration) did not differentiate the resultsof the MS group, but patients with PPMS (primaryprogressive MS) exhibited a deficit in perceptual priming.Conclusions: The results indicate a dissociation in implicitmemory: normal semantic priming and pathologicalperceptual priming. Mechanisms of difficulties in perceptualpriming depending on course of MS and methodologicalaspects of the priming procedure are discussed.
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