Neuropsychological outcomes after psychosocial intervention for depression in Parkinson's disease.
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ABSTRACT:
SUBMITTER: Dobkin RD
PROVIDER: S-EPMC4144827 | biostudies-literature | 2014
REPOSITORIES: biostudies-literature
Publications
Neuropsychological outcomes after psychosocial intervention for depression in Parkinson's disease.
Dobkin Roseanne D RD Tröster Alexander I AI Rubino Jade Tiu JT Allen Lesley A LA Gara Michael A MA Mark Margery H MH Menza Matthew M
The Journal of neuropsychiatry and clinical neurosciences 20140101 1
The authors describe neuropsychological outcomes in people with Parkinson's disease (PD) after their participation in an NIH-sponsored, randomized, controlled trial of cognitive-behavioral treatment for depression. Improvements in mood were associated with modest gains in verbal memory and executive functioning over the 10-week treatment period and accounted for greater variance in neuropsychological outcomes at the end of treatment than other known correlates of cognitive functioning in PD, suc ...[more]
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Project description:ObjectiveThe aim of this study was to evaluate the neurobehavioral safety of constant-current subthalamic deep brain stimulation and to compare the neuropsychological effects of stimulation versus electrode placement alone.MethodsA total of 136 patients with Parkinson's disease underwent bilateral subthalamic device implantation in this randomized trial. Patients received stimulation either immediately after device implantation (n = 101; active stimulation) or beginning 3 months after surgery (n = 35; delayed activation control). Patients were administered neuropsychological tests before, 3, and 12 months after device implantation.ResultsNeuropsychological change in stimulation and control groups were comparable. Within-group analyses revealed declines in category and switching verbal fluency in both groups, but only the stimulation group had letter verbal fluency and Stroop task declines. Depression symptom improvements occurred in both groups, but more often in the stimulation group. Letter fluency declines were associated with worse Parkinson's Disease Questionnaire Communication subscale scores. Baseline and 12-month comparisons (in the combined group) revealed gains in verbal and visual delayed recall scores and improvement in depression symptoms, but decrements in verbal fluency and Stroop scores.ConclusionsConstant-current bilateral subthalamic stimulation had a good cognitive safety profile except for decrements in verbal fluency and on the Stroop task. These abnormalities are related to device implantation, but stimulation likely had an additive effect. One year after surgery, the cognitive changes did not exert a detrimental effect on quality of life, although letter fluency declines were associated with communication dissatisfaction at 12 months. Improvement in depressive symptom severity appears dependent on stimulation and not placebo or lesion effects. © 2016 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society.
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