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Originalartikel

Dual tasking in Alzheimer’s disease and depression

Published Online:https://doi.org/10.1024/1016-264X/a000089

Alzheimer’s disease (AD) is associated with a marked impairment in the ability to do two things at once, or ‘dual task’. Several studies have reported that depression is also associated with impairments in cognitive functioning, particularly executive functioning, but it remains unclear if depression also leads to impairments in dual tasking ability. Therefore, this paper describes two experiments, assessing (1) dual tasking ability in 50 people with AD and 50 healthy controls, and (2) dual tasking and planning ability, as assessed using the Tower of Hanoi task, in 24 people with depression and 21 healthy controls. The AD group showed marked impairment in dual tasking ability, but the depressed group showed impairment on the Tower of Hanoi task, but preserved performance on the measure of dual tasking. This shows that shows that whereas AD is associated with gross impairment in dual tasking ability, depression is associated with a patchy pattern of impairment across the different cognitive functions, but, importantly, preserved dual tasking ability.


Dual Tasking bei Alzheimer-Erkrankungen und Depression

Die Demenz vom Alzheimer-Typ (AD) ist gekennzeichnet durch einen deutliche Einschränkung der Fähigkeit zwei Dinge auf einmal zu tun, d. h. der Fähigkeit zum ′dual-tasking′. Mehrere Studien berichteten dass Depression ebenfalls mit Defiziten kognitiver Funktionen einhergehen, insbesondere der exekutiven Funktionen, aber es blieb unklar ob Depression ebenfalls zu Einschränkungen der Fähigkeit zum dual-tasking führt. Daher beschreibt unsere Studie zwei Experimente zum (1) Untersuchung der Fähigkeit zum dual-tasking bei 50 Personen mit AD im Vergleich zu 50 gesunden Kontrollpersonen, und (2) Dual-Tasking und Planungsfähigkeit, operationalisiert durch die Turm-von-Hanoi-Aufgabe bei 24 depressiv Erkrankten verglichen mit 21 Kontrollpersonen. Die AD-Gruppe zeigte deutliche Beeinträchtigungen in der Fähigkeit zum Dual-Tasking während die depressiv Erkrankten Einrschränkungen beim Turm-von-Hanoi zeigten, aber erhaltene Dual-Tasking-Leistungen. Die zeigt auf, dass während AD mit deutlichen Dual-Tasking-Beeinträchtigungen assoziiert ist Depression mit einem unscharfen Muster von Defiziten verschiedener kognitiver Funktionen verbunden ist, aber – was wichtig ist – mit einer erhaltenen Fähigkeit zum Dual-Tasking.

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