Deep brain stimulation of the nucleus basalis of Meynert in Alzheimer's dementia.

Cholinergic neurons of the medial forebrain are considered important contributors to brain plasticity and neuromodulation. A reduction of cholinergic innervation can lead to pathophysiological changes of neurotransmission and is observed in Alzheimer's disease. Here we report on six patients with mild to moderate Alzheimer's disease (AD) treated with bilateral low-frequency deep brain stimulation (DBS) of the nucleus basalis of Meynert (NBM). During a four-week double-blind sham-controlled phase and a subsequent 11-month follow-up open label period, clinical outcome was assessed by neuropsychological examination using the Alzheimer's Disease Assessment Scale-cognitive subscale as the primary outcome measure. Electroencephalography and [(18)F]-fluoro-desoxyglucose positron emission tomography were, besides others, secondary endpoints. On the basis of stable or improved primary outcome parameters twelve months after surgery, four of the six patients were considered responders. No severe or non-transitional side effects related to the stimulation were observed. Taking into account all limitations of a pilot study, we conclude that DBS of the NBM is both technically feasible and well tolerated.

Subjectively perceived personality and mood changes associated with subthalamic stimulation in patients with Parkinson's disease.

BACKGROUND: Clinical and ethical implications of personality and mood changes in Parkinson's disease (PD) patients treated with subthalamic deep brain stimulation (STN-DBS) are under debate. Although subjectively perceived personality changes are often mentioned by patients and caregivers, few empirical studies concerning these changes exist. Therefore, we analysed subjectively perceived personality and mood changes in STN-DBS PD patients. METHOD: In this prospective study of the ELSA-DBS group, 27 PD patients were assessed preoperatively and 1 year after STN-DBS surgery. Two categories, personality and mood changes, were analysed with semi-structured interviews. Patients were grouped into personality change yes/no, as well as positive/negative mood change groups. Caregivers were additionally interviewed about patients' personality changes. Characteristics of each group were assessed with standard neurological and psychiatric measurements. Predictors for changes were analysed. RESULTS: Personality changes were perceived by six of 27 (22%) patients and by 10 of 23 caregivers (44%). The preoperative hypomania trait was a significant predictor for personality change perceived by patients. Of 21 patients, 12 (57%) perceived mood as positively changed. Higher apathy and anxiety ratings were found in the negative change group. CONCLUSIONS: Our results show that a high proportion of PD patients and caregivers perceived personality changes under STN-DBS, emphasizing the relevance of this topic. Mood changed in positive and negative directions. Standard measurement scales failed to adequately reflect personality or mood changes subjectively perceived by patients. A more individualized preoperative screening and preparation for patients and caregivers, as well as postoperative support, could therefore be useful.

[Preimplantation and prenatal counseling. Interdisciplinary and multiprofessional approach]. / Beratung bei Präimplantations- und Pränataldiagnostik. Interdisziplinär und multiprofessionell.

Several new legal regulations and guidelines introduced in 2010 have changed the duties involved in medical information and counseling on preimplantation genetics (PGD) and prenatal diagnosis (PND).These regulations share the goal of a high-quality health service offering patients interdisciplinary and multidisciplinary expertise, especially taking into account psychological and social aspects. This contribution presents crucial elements for cooperating counseling in the PGD and PND fields. It considers results from a nationwide survey of all professional groups involved in counseling after a pathological prenatal diagnosis according to the law. Crucial to interdisciplinary counseling are choosing the appropriate medical specialty for referral, a positive basis for cooperation, and the right time for consulting another doctor. Several central issues have been identified for successful multidisciplinary counseling: identifying the suitable moment and method to establish contact between the patient and psychosocial counselor, focusing on PGD and PND centers as well as on the transparent qualifications of psychosocial counselors, and appreciating the importance of cooperation.

[Deep brain stimulation for psychiatric disorders: historical basis]. / Die tiefe Hirnstimulation bei psychiatrischen Erkrankungen : Historische Grundlagen.

Deep brain stimulation (DBS), which is already established as an effective treatment for movement disorders, such as Parkinson's disease, is increasingly being considered as a therapy option for mental diseases. Due to the increasing number of successful applications of DBS for otherwise therapy-resistant psychiatric diseases, DBS is becoming more and more of interest in fields of fundamental research as well as clinical care. However, the stimulation system is a medical product which has to be neurosurgically implanted and this fact is often used to draw certain analogies to earlier psychosurgical approaches in the era of Freeman. But, looking at the historical development of DBS, as is the aim of the present systematic and literature-based overview, it becomes obvious that DBS did not arise exclusively from the inglorious period of psychosurgery. In fact, two partly in parallel evolving lines of medical progress have contributed to the development of DBS as it is applied today. One of these lines is the use of lesional neurosurgical procedures, such as incision of capsules and cingulotomy, which in contrast to psychosurgical interventions in the era of Freeman, is aimed at subcortical structures and provides important basic knowledge for the choice of target points. In addition DBS is rooted in the application of an electrical charge with the goal to stimulate neuronal networks.

Health Literacy in Individuals at Risk for Alzheimer's Dementia: A Systematic Review.

BACKGROUND: Health literacy (HL) refers to the capacity to access, understand, appraise and apply information for decision-making and acting in health-related matters. In the field of Alzheimer's disease (AD), expanding technologies of early disease detection, disease course prediction and eventually personalized prevention confront individuals at-risk with increasingly complex information, which demand substantial HL skills. Here we report current findings of HL research in at-risk groups. METHODS: Search strings, referring to HL, AD, amyloid and risk, were developed. A systematic review was conducted in PUBMED, Cochrane Library, PsycINFO, and Web of Science to summarize the state of evidence on HL in at-risk individuals for Alzheimer's dementia. Eligible articles needed to employ a validated tool for HL, mention the concept or one dimension (access, understand, appraise and apply information for decision-making and acting). RESULTS: 26 quantitative and 9 qualitative studies addressing at least one dimension of HL were included. Overall, there is evidence for a wish to gain knowledge about the own brain status and risk of dementia. Psychological distress may occur and the subjective benefit-risk estimation may be modified after risk disclosure. Effects on lifestyle and planning may occur. Overall understanding and appraisal of information related to AD risk seem variable with several impacting factors. In mild cognitive impairment (MCI) basic HL skill seem to be affected by cognitive dysfunction. CONCLUSIONS: Systematic assessment of HL in at-risk population for AD is sparse. Findings indicate the paramount importance of adequate communication with persons at risk, being sensitive to individual needs and preferences. Substantial research needs were identified.

[Approaches to ethical decision making in correlation with medical quality management]. / Ansätze ethischer Urteilsbildung im Zusammenhang mit ärztlichem Qualitätsmanagement.

The subject as well as the tool of quality management deal with ethical questions. It is shown what ethics can contribute to quality management. Three different concepts of assessing an act (consequentialism, deontology, virtue ethics) are presented and their consequences for the everyday decisions of physicians are described. Ethical considerations are made about the notion quality in the framework of quality management, about the function of economical aspects in quality-planning, and about the role of guidelines as instruments for quality-improvement and -assurance.

[Ethical problems in prenatal diagnosis]. / Ethische Fragestellungen in der Pränataldiagnostik.

With regard to the aim of prenatal diagnosis two types can be distinguished, a therapy-referring and an existence-referring one. In the context of both types goods are endangered. From en ethical point of view both types are differently justified. In the scope of ultrasound-screening both types are mixed and special problems of counselling and informed consent emerge. In the context of genetic prenatal diagnosis a possible preimpact of a right to privacy is discussed. Finally several proposals are made concerning a collaboration of medical care and psychosocial counselling in the frame of prenatal diagnosis. Probably they can contribute to a protection of the endangered goods.

Clinical effectiveness of unilateral deep brain stimulation in Tourette syndrome.

Dysfunctional basal ganglia loops are thought to underlie the clinical picture of Tourette syndrome (TS). By altering dopaminergic activity in the affected neural structures, bilateral deep brain stimulation is assumed to have a modulatory effect on dopamine transmission resulting in an amelioration of tics. While the majority of published case reports deals with the application of bilateral stimulation, the present study aims at informing about the high effectiveness of unilateral stimulation of pallidal and nigral thalamic territories in TS. Potential implications and gains of the unilateral approach are discussed.