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Neurovascular coupling in Parkinson's disease patients: effects of dementia and acetylcholinesterase inhibitor treatment.
MedLine Citation:
PMID:  20847429     Owner:  NLM     Status:  In-Process    
Alzheimer's disease (AD) and Parkinson's disease (PD) lead to a cholinergic deficit in the brain which is not only related to dementia, but may also lead to a disturbed neurovascular coupling. We investigated the effect of cholinergic decline on neurovascular coupling in PD patients. Patients with idiopathic PD were divided in groups without (n=59; 65 ± 9 y) or with moderate dementia as specified by Mini-Mental State Examination. The demented patients were assigned to groups with (n=55; 73 ± 6 y) or without (n=61; 72 ± 8 y) acetylcholinesterase inhibitor treatment. Neurovascular coupling was assessed by a simultaneous electroencephalography-Doppler technique applying a contrast-based visual stimulation task. Visually evoked potential amplitudes (N75-P100) and parameters of the hemodynamic response in the posterior cerebral artery were obtained using a control system approach (resting flow velocity, gain, attenuation, rate time, and natural frequency). Data were compared to a healthy control group of a similar age range (n=20; 63 ± 8 yr). Compared to controls, patient groups presented no differences in evoked potential amplitudes or neurovascular coupling parameters. The reported 30% decline in acetylcholinesterase activity in PD patients did not lead to measurable changes in neurovascular coupling. In AD patients additional factors might explain the uncoupling and higher cerebrovascular risk detected in clinical studies.
Bernhard Rosengarten; Veren Dannhardt; Ole Burr; Matthias Pöhler; Susanne Rosengarten; Matthias Oechsner; Iris Reuter
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of Alzheimer's disease : JAD     Volume:  22     ISSN:  1875-8908     ISO Abbreviation:  J. Alzheimers Dis.     Publication Date:  2010  
Date Detail:
Created Date:  2010-11-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9814863     Medline TA:  J Alzheimers Dis     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  415-21     Citation Subset:  IM    
Department of Neurology of the Justus-Liebig University-Giessen, Giessen, Germany.
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