Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease
William J McGeown1, Michael F Shanks1, Annalena Venneri1,21University of Hull, Hull, UK; 2University of Modena and Reggio Emilia, ItalyAbstract: Neuroimaging studies of cholinesterase inhibitor (ChEI) treatment in Alzheimer’s disease (AD) indicate that the short and long term actions o...
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Dove Medical Press
2008
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oai:doaj.org-article:faef9dd67530430eba75a9859bd8b7b62021-12-02T03:31:39ZProlonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease1176-63281178-2021https://doaj.org/article/faef9dd67530430eba75a9859bd8b7b62008-04-01T00:00:00Zhttp://www.dovepress.com/prolonged-cholinergic-enrichment-influences-regional-cortical-activati-a1025https://doaj.org/toc/1176-6328https://doaj.org/toc/1178-2021William J McGeown1, Michael F Shanks1, Annalena Venneri1,21University of Hull, Hull, UK; 2University of Modena and Reggio Emilia, ItalyAbstract: Neuroimaging studies of cholinesterase inhibitor (ChEI) treatment in Alzheimer’s disease (AD) indicate that the short and long term actions of ChEIs are dissimilar. fMRI studies of the ChEI rivastigmine have focused on its short term action. In this exploratory study the effect of prolonged (20 weeks) rivastigmine treatment on regional brain activity was measured with fMRI in patients with mild AD. Eleven patients with probable AD and nine age-matched controls were assessed with a Pyramids and Palm Trees semantic association and an n-back working memory fMRI paradigm. In the patient group only, the assessment was repeated after 20 weeks of treatment. There was an increase in task-related brain activity after treatment with activations more like those of normal healthy elderly. Behaviorally, however, there were no significant differences between baseline and retest scores, with a range of performance probably reflecting variation in drug efficacy across patients. Variable patient response and drug dynamic/kinetic factors in small patient groups will inevitably bias (either way) the effect size of any relevant drug related changes in activation. Future studies should take drug response into account to provide more insight into the benefits of ChEI drugs at the individual level.Keywords: fMRI, rivastigmine, treatment, dementia, Alzheimer’s disease William J McGeownMichael F ShanksAnnalena VenneriDove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2008, Iss Issue 2, Pp 465-476 (2008) |
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EN |
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Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 |
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Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 William J McGeown Michael F Shanks Annalena Venneri Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| description |
William J McGeown1, Michael F Shanks1, Annalena Venneri1,21University of Hull, Hull, UK; 2University of Modena and Reggio Emilia, ItalyAbstract: Neuroimaging studies of cholinesterase inhibitor (ChEI) treatment in Alzheimer’s disease (AD) indicate that the short and long term actions of ChEIs are dissimilar. fMRI studies of the ChEI rivastigmine have focused on its short term action. In this exploratory study the effect of prolonged (20 weeks) rivastigmine treatment on regional brain activity was measured with fMRI in patients with mild AD. Eleven patients with probable AD and nine age-matched controls were assessed with a Pyramids and Palm Trees semantic association and an n-back working memory fMRI paradigm. In the patient group only, the assessment was repeated after 20 weeks of treatment. There was an increase in task-related brain activity after treatment with activations more like those of normal healthy elderly. Behaviorally, however, there were no significant differences between baseline and retest scores, with a range of performance probably reflecting variation in drug efficacy across patients. Variable patient response and drug dynamic/kinetic factors in small patient groups will inevitably bias (either way) the effect size of any relevant drug related changes in activation. Future studies should take drug response into account to provide more insight into the benefits of ChEI drugs at the individual level.Keywords: fMRI, rivastigmine, treatment, dementia, Alzheimer’s disease |
| format |
article |
| author |
William J McGeown Michael F Shanks Annalena Venneri |
| author_facet |
William J McGeown Michael F Shanks Annalena Venneri |
| author_sort |
William J McGeown |
| title |
Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| title_short |
Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| title_full |
Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| title_fullStr |
Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| title_full_unstemmed |
Prolonged cholinergic enrichment influences regional cortical activation in early Alzheimer’s disease |
| title_sort |
prolonged cholinergic enrichment influences regional cortical activation in early alzheimer’s disease |
| publisher |
Dove Medical Press |
| publishDate |
2008 |
| url |
https://doaj.org/article/faef9dd67530430eba75a9859bd8b7b6 |
| work_keys_str_mv |
AT williamjmcgeown prolongedcholinergicenrichmentinfluencesregionalcorticalactivationinearlyalzheimeramprsquosdisease AT michaelfshanks prolongedcholinergicenrichmentinfluencesregionalcorticalactivationinearlyalzheimeramprsquosdisease AT annalenavenneri prolongedcholinergicenrichmentinfluencesregionalcorticalactivationinearlyalzheimeramprsquosdisease |
| _version_ |
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