Browsing by Author "Karamürsel, Sacit"
Now showing items 1-2 of 2
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Cognitive impairment in amyotrophic lateral sclerosis: evidence from neuropsychological investigation and event-related potentials
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Publisher and Date:(Elsevier Science Bv, 2002)The presence of subclinical cognitive impairment in patients with amyotrophic lateral sclerosis (ALS) is investigated using neuropsychological assessment and event-related potential recordings (ERP). An extensive battery of neuropsychological tests assessing the domains of attention memory language visuo-spatial and executive functions were administered to 20 non-demented patients with sporadic ALS and 13 age- and education-matched healthy control subjects. Mismatch negativity (MMN) P3b P3a (novelty ...
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Effects of cold stress on early and late stimulus gating
Authors:
Publisher and Date:(Elsevier Ireland Ltd., 2005)The P50 component of the event-related potential (ERP) mainly reflects early pre-attentional processing. Along with P50 the N100 component and mismatch negativity (MMN) were postulated to represent a complex multistage and multi-component gating system. If some variable threshold or gating is exceeded by the MMN signal the MMN is often followed by a relatively sharp fronto-central positive wave the P3a component which reflects an attentional switch to an environmental change. The P50 was shown to ...
