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Neuropsychological correlates of apathy in mild cognitive impairment and Alzheimer's disease: the role of executive functioning

Published online by Cambridge University Press:  28 June 2011

Rosa L. Drijgers ,
Frans R. J. Verhey ,
Albert F. G. Leentjens ,
Sebastian Köhler  and
Pauline Aalten
Rosa L. Drijgers
Affiliation:
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, Maastricht, The Netherlands
Frans R. J. Verhey
Affiliation:
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, Maastricht, The Netherlands
Albert F. G. Leentjens
Affiliation:
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, Maastricht, The Netherlands
Sebastian Köhler
Affiliation:
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, Maastricht, The Netherlands
Pauline Aalten*
Affiliation:
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, Maastricht, The Netherlands
*
Correspondence should be addressed to: Dr. P. Aalten, Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience/Alzheimer Center Limburg, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands. Phone: +31 43 3877443; Fax: +31 43 3875444. Email: [email protected].
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Abstract

Background: Apathy is a common and important behavioral syndrome in various neuropsychiatric diseases, such as mild cognitive impairment (MCI) and Alzheimer's disease (AD). So far, only few studies have compared the neuropsychological correlates of apathy in patients with MCI and dementia. The aim of the current study was to examine the association between apathy and neuropsychological functioning in patients with MCI and AD.

Methods: Two-hundred-and-sixty AD patients and 178 MCI patients visiting the Memory Clinic of the Maastricht University Medical Centre participated in the study. Linear regression analysis, corrected for age, gender, level of education and depression, was performed to reveal cross-sectional associations between apathy and scores on neuropsychological tests of memory, attention, psychomotor speed and executive functioning.

Results: In patients with MCI, apathy was characterized by decreased verbal fluency and psychomotor tracking. In AD, patients with apathy differed from non-apathetic patients only on a verbal fluency task.

Conclusion: Apathy is related to executive dysfunction in the early phases of cognitive decline. In particular, in the prodromal phase of AD, apathy seems to be characterized by poor initiating. In the more advanced stages of cognitive deterioration, associations between apathy and specific neuropsychological correlates may be obscured by the more severe neuropathology. Awareness of apathy in the early phase of cognitive impairment may help in early diagnosis of AD.

Keywords

apathyneuropsychological profileAlzheimer'sMCI
Type
Research Article
Information
International Psychogeriatrics , Volume 23 , Issue 8 , October 2011 , pp. 1327 - 1333
Copyright
Copyright © International Psychogeriatric Association 2011

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