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OBJECTIVES: This study aimed to evaluate the effects of a multicomponent psychotherapy programme for people with mild Alzheimer's dementia (AD) and their caregivers on depression and related neuropsychiatric symptoms. METHOD: The cognitive behavioural therapy (CBT)-based treatment consisted of 25 weekly sessions, including behavioural activation, behaviour management, interventions for the caregiver, reminiscence, couples counselling, and cognitive restructuring. 41 participants and their caregivers were randomised to either the CBT or the control group, which received treatment-as-usual (TAU). Follow-ups took place at 6 and 12 months posttreatment. The primary outcome was depression in the patient with AD. The secondary outcomes were apathy, other neuropsychiatric symptoms, functional abilities, quality of life, and quality of the relationship with the caregiver. RESULTS: Linear mixed models revealed a statistically significant superiority of CBT regarding clinician-rated depression at the 12-month follow-up with large effect sizes (within-subject d = 1.22, between-subject d = 1.00). Effect sizes were only moderate for self-rated depression and small for informant-rated depression. There was also a significant advantage for CBT regarding clinician-rated apathy, relationship quality, and informant-rated quality of life (QoL) but not for the other neuropsychiatric symptoms or self-rated QoL. CONCLUSION: The results are very encouraging and support an adequately powered multicentre study.Trial registration: ClinicalTrials.gov NCT01273272. Date of registration: 3 Jan 2011.
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In old age, the chronic use of substances such as alcohol and sedatives, and more recently opioids, is a major public health and personal problem. Despite this, relatively little attention has been paid to the disorders associated with the use of these substances. These recommendations have been formulated by the Swiss Society for Elderly Psychiatry and Psychotherapy (SPPA) in collaboration with the Swiss Nurses' Association (SNA) and the Swiss Society for Addiction Medicine (SSAM). They provide a summary of the knowledge about addiction disorders in old age for the benefit of those working with patients, with the aim of strengthening prevention, early detection and appropriate interventions.
À l'âge avancé, la consommation chronique de substances comme l'alcool et les sédatifs, et plus récemment les opioïdes, représente un important problème pour les personnes concernées et de santé publique. Malgré cela, relativement peu d'attention a été accordée aux troubles associés à la consommation de ces substances. Les présentes recommandations ont été formulées par la Société suisse de psychiatrie et psychothérapie de la personne âgée (SPPA) en collaboration avec l'Association suisse des infirmières et infirmiers (ASI) et la Société suisse de médecine de l'addiction (SSMA). Elles mettent à la disposition des intervenants auprès des patients un résumé des connaissances au sujet des troubles addictifs à l'âge avancé, avec comme objectif de renforcer la prévention et le dépistage précoce, et des interventions adaptées.
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Medicina do Vício , Comportamento Aditivo , Idoso , Analgésicos Opioides , Comportamento Aditivo/diagnóstico , Comportamento Aditivo/prevenção & controle , Humanos , Hipnóticos e Sedativos , PsicoterapiaRESUMO
BACKGROUND: The present study aims to investigate the quality of the dyadic relationship between mild Alzheimer patients and their caregivers. The main objective is to evaluate the consistency, agreement and validity of the German version of the Scale for Quality of the Current Relationship in Caregiving (SQCRC). The secondary objective was to examine the association of relationship quality with quality of life (QOL) in patients with mild Alzheimer's disease (AD) and their caregivers. METHODS: In this study, a sample of 50 patients diagnosed with mild AD and their primary caregivers were included. Participants underwent a full neuropsychological evaluation. The quality of the relationship between persons with AD and their caregivers was assessed using the SQCRC. Furthermore, other scales of relationship quality, well-being of the person with AD, and well-being of the caregiver were used. RESULTS: The results showed that the SQCRC has a good internal consistency and high validity. Also, relationship quality as rated by the AD patients (r = 0.37, P < 0.1) and their caregivers (r = 0.51, P < 0.1) was significantly correlated with QOL. CONCLUSIONS: The findings suggest that many persons with mild AD can rate their relationship quality and that the patient's self-rated relationship quality is a substantial predictor of their QOL.
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Doença de Alzheimer , Demência , Doença de Alzheimer/complicações , Cuidadores , Demência/complicações , Humanos , Testes Neuropsicológicos , Qualidade de VidaRESUMO
ABSTRACTBackground:In randomized controlled trials, Ginkgo biloba extract EGb 761® has been found to be effective in the treatment of behavioral and psychological symptoms of dementia (BPSD). METHODS: To assess the effects of EGb 761® on specific BPSD, we analyzed data from all randomized, placebo-controlled, at least 20-week, trials of EGb 761® enrolling patients with dementia (probable Alzheimer's disease (AD), probable vascular dementia or probable AD with cerebrovascular disease) who had clinically significant BPSD (Neuropsychiatric Inventory (NPI) total score at least 6). Data were pooled and joint analyses of NPI single item composite and caregiver distress scores were performed by meta-analysis with a fixed effects model. RESULTS: Four trials involving 1628 patients (EGb 761®, 814; placebo, 814) were identified; treatment duration was 22 or 24 weeks; the daily dose of EGb 761® was 240 mg in all trials. Pooled analyses including data from the full analysis sets of all trials (EGb 761®, 796 patients; placebo, 802 patients) revealed significant superiority of EGb 761® over placebo in total scores and 10 single symptom scores. Regarding caregiver distress scores, EGb 761®-treated patients improved significantly more than those receiving placebo in all symptoms except delusions, hallucinations, and elation/euphoria. The benefit of EGb 761® mainly consists of improvement in symptoms present at baseline, but the incidence of some symptoms was also decreased. CONCLUSIONS: Twenty two- to twenty four-week treatment with Ginkgo biloba extract EGb 761® improved BPSD (except psychotic-like features) and caregiver distress caused by such symptoms.
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Sintomas Comportamentais/tratamento farmacológico , Demência/tratamento farmacológico , Ginkgo biloba/química , Transtornos Mentais/tratamento farmacológico , Fitoterapia/métodos , Extratos Vegetais/administração & dosagem , Extratos Vegetais/uso terapêutico , Idoso , Sintomas Comportamentais/complicações , Cognição/efeitos dos fármacos , Demência/complicações , Humanos , Masculino , Transtornos Mentais/complicações , Pessoa de Meia-Idade , Extratos Vegetais/efeitos adversos , Escalas de Graduação Psiquiátrica , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do TratamentoRESUMO
Aß deposition is a driving force of Alzheimer's disease pathology and can be detected early by amyloid positron emission tomography. Identifying presymptomatic structural brain changes associated with Aß deposition might lead to a better understanding of its consequences and provide early diagnostic information. In this respect we analyzed measures of cortical thickness and subcortical volumes along with hippocampal, thalamic and striatal shape and surface area by applying novel analysis strategies for structural magnetic resonance imaging. We included 69 cognitively normal elderly subjects after careful clinical and neuropsychological workup. Standardized uptake value ratios (cerebellar reference) for uptake of 11-C-Pittsburgh Compound B (PiB) were calculated from positron emission tomographic data for a cortical measurement and for bilateral hippocampus, thalamus and striatum. Associations to shape, surface area, volume and cortical thickness were tested using regression models that included significant predictors as covariates. Left anterior hippocampal shape was associated with regional PiB uptake (P < 0.05, FDR corrected), whereas volumes of the hippocampi and their subregions were not associated with cortical or regional PiB uptake (all P > 0.05, FDR corrected). Within the entorhinal cortical region of both hemispheres, thickness was negatively associated with cortical PiB uptake (P < 0.05, FDR corrected). Hence, localized shape measures and cortical thickness may be potential biomarkers of presymptomatic Alzheimer's disease.
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Peptídeos beta-Amiloides/metabolismo , Hipocampo/diagnóstico por imagem , Idoso , Idoso de 80 Anos ou mais , Compostos de Anilina , Benzotiazóis , Feminino , Hipocampo/crescimento & desenvolvimento , Humanos , Masculino , Pessoa de Meia-Idade , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , TiazóisRESUMO
The prevalence of the behavioral and psychological symptoms of dementia (BPSD) is very high in dementia patients. Alterations in multiple neurotransmitter systems are involved in the pathogenesis of BPSD. These symptoms complicate the therapy and outcome. Because of multimorbidity and polpharmacy the therapy of BPSD is difficult and needs continuous clinical observation of the patients. Non-pharmacological interventions must be the first choice of therapy before medication and may accompany the pharmacological treatment. Several non-pharmacological interventions are available and summarized in the following therapy recommendations of the Swiss medical societies. Pharmacological interventions are often accompanied by severe adverse events in dementia patients. Their use must be limited in time and quantity. A critical survey of pharmacological therapy options in dementia is necessary.
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Doença de Alzheimer/psicologia , Doença de Alzheimer/terapia , Sintomas Comportamentais/psicologia , Sintomas Comportamentais/terapia , Comportamento Cooperativo , Comunicação Interdisciplinar , Idoso , Doença de Alzheimer/diagnóstico , Sintomas Comportamentais/diagnóstico , Cuidadores/educação , Cuidadores/psicologia , Administração de Caso , Terapia Combinada , Interações Medicamentosas , Humanos , Equipe de Assistência ao Paciente , Psicotrópicos/efeitos adversos , Psicotrópicos/uso terapêutico , Terapia Socioambiental , SuíçaRESUMO
Insulin and cortisol play a key role in the regulation of energy homeostasis, appetite, and satiety. Little is known about the action and interaction of both hormones in brain structures controlling food intake and the processing of neurovisceral signals from the gastrointestinal tract. In this study, we assessed the impact of single and combined application of insulin and cortisol on resting regional cerebral blood flow (rCBF) in the insular cortex. After standardized periods of food restriction, 48 male volunteers were randomly assigned to receive either 40 IU intranasal insulin, 30 mg oral cortisol, both, or neither (placebo). Continuous arterial spin labeling (CASL) sequences were acquired before and after pharmacological treatment. We observed a bilateral, locally distinct rCBF increase after insulin administration in the insular cortex and the putamen. Insulin effects on rCBF were present regardless of whether participants had received cortisol or not. Our results indicate that insulin, but not cortisol, affects blood flow in human brain structures involved in the regulation of eating behavior.
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Córtex Cerebral/efeitos dos fármacos , Circulação Cerebrovascular/efeitos dos fármacos , Hidrocortisona/administração & dosagem , Hipoglicemiantes/administração & dosagem , Insulina/administração & dosagem , Administração Oral , Adulto , Análise de Variância , Relação Dose-Resposta a Droga , Método Duplo-Cego , Jejum , Humanos , Hidrocortisona/metabolismo , Imageamento por Ressonância Magnética , Masculino , Saliva/metabolismo , Marcadores de Spin , Fatores de Tempo , Escala Visual Analógica , Adulto JovemRESUMO
INTRODUCTION: The «Recommendations for the Diagnosis and Treatment of Behavioral and Psychological Symptoms of Dementia (BPSD)¼ were developed in parallel with the Swiss National Dementia Strategy 2014-2019 under the auspices of the Swiss Society for Geriatric Psychiatry and Psychotherapy (SGAP) and mark the beginning of a series of recommendations for geriatric psychiatric disorders. They depict the evidence-based state of knowledge about diagnostics and therapy, based on the clinical experience of the experts, and are designed for interprofessional and interdisciplinary use. The non-pharmacological intervention options and pharmacotherapy are discussed in detail. This paper is the revised version of the 2014 publication and compiles the development in this area for everyday clinical practice.
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Demência , Psicoterapia , Humanos , IdosoRESUMO
Alzheimer's disease (AD) is characterized by amyloid-beta (Abeta)-containing plaques, neurofibrillary tangles, and neuron and synapse loss. Tangle formation has been reproduced in P301L tau transgenic pR5 mice, whereas APP(sw)PS2(N141I) double-transgenic APP152 mice develop Abeta plaques. Cross-breeding generates triple transgenic ((triple)AD) mice that combine both pathologies in one model. To determine functional consequences of the combined Abeta and tau pathologies, we performed a proteomic analysis followed by functional validation. Specifically, we obtained vesicular preparations from (triple)AD mice, the parental strains, and nontransgenic mice, followed by the quantitative mass-tag labeling proteomic technique iTRAQ and mass spectrometry. Within 1,275 quantified proteins, we found a massive deregulation of 24 proteins, of which one-third were mitochondrial proteins mainly related to complexes I and IV of the oxidative phosphorylation system (OXPHOS). Notably, deregulation of complex I was tau dependent, whereas deregulation of complex IV was Abeta dependent, both at the protein and activity levels. Synergistic effects of Abeta and tau were evident in 8-month-old (triple)AD mice as only they showed a reduction of the mitochondrial membrane potential at this early age. At the age of 12 months, the strongest defects on OXPHOS, synthesis of ATP, and reactive oxygen species were exhibited in the (triple)AD mice, again emphasizing synergistic, age-associated effects of Abeta and tau in perishing mitochondria. Our study establishes a molecular link between Abeta and tau protein in AD pathology in vivo, illustrating the potential of quantitative proteomics.
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Doença de Alzheimer , Peptídeos beta-Amiloides/metabolismo , Camundongos Transgênicos , Fosforilação Oxidativa , Proteínas tau/metabolismo , Doença de Alzheimer/genética , Doença de Alzheimer/metabolismo , Doença de Alzheimer/patologia , Peptídeos beta-Amiloides/genética , Animais , Humanos , Espectrometria de Massas/métodos , Potencial da Membrana Mitocondrial/fisiologia , Camundongos , Mitocôndrias/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Proteínas tau/genéticaRESUMO
Recommendations for the Prevention, Diagnostics and Therapy of Addiction Disorders in the Elderly Abstract. Although the chronic consumption of alcohol and sedatives, and increasingly opioids, represents a major problem in old age with consequential damage for those affected, little attention has been paid to the substance abuse disorders in old age. The aim of the present recommendations, a collaboration work of the Swiss Society for Geriatric Psychiatry and Psychotherapy (SGAP), Swiss Nurses Association (SBK) and Swiss Society of Addiction Medicine (SSAM), is to summarize the current state of knowledge in prevention, diagnostics and therapy of substance abuse disorders in old age for an interprofessional clinical team. They are intended to help strengthen prevention and early diagnosis, and consciously emphasize psychotherapy and nursing intervention options.
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Comportamento Aditivo , Transtornos Relacionados ao Uso de Substâncias , Idoso , Benzodiazepinas , Humanos , Psicoterapia , Transtornos Relacionados ao Uso de Substâncias/diagnóstico , Transtornos Relacionados ao Uso de Substâncias/prevenção & controleRESUMO
Recommendations for the Diagnosis and Therapy of Psychotic Disorders in the Elderly Abstract. Psychotic disorders in the elderly cover a wide range of causes and manifestations. They often occur as part of a depression, dementia, substance abuse or delirium. While psychosis can occur with a first manifestation in advanced age, many patients with chronic psychotic disorders reach a high age. Many elderly individuals are also affected by cognitive impairment and somatic conditions, making a third-party history most relevant. The associated changes in life and the complexity of the individual situation needs to be integrated into the diagnosis and treatment. The presented recommendations have been developed under the lead of the Swiss Society of Old Age Psychiatry (SGAP) in collaboration with the Swiss Association of Nurses (SBK) and the subcommittees for gerontological and psychiatric nursing of the association of nursing science (VFP) as well as further professional societies. We aim to make current knowledge concerning diagnosis and treatment available to the interprofessional teams working in in- and outpatients' settings.
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Geriatria , Transtornos Psicóticos , Transtornos Relacionados ao Uso de Substâncias , Idoso , Humanos , Pacientes Ambulatoriais , Transtornos Psicóticos/diagnóstico , Transtornos Psicóticos/epidemiologia , Transtornos Psicóticos/terapiaRESUMO
OBJECTIVES: Alzheimer disease (AD) has been associated with diminished function of the biological clock in the suprachiasmatic nuclei (SCN) and pronounced circadian sleep-wake cycle disturbances. Few studies have investigated other dementia etiologies. Because alcohol acts on the SCN and modifies circadian rhythms in animal studies, Korsakoff psychosis (KP) may also be associated with circadian rhythm abnormalities. This pilot study investigated the rest-activity cycle of KP to see whether there were sleep-wake cycle disturbances similar to those that the authors had observed in patients with AD. DESIGN AND SETTING: Cross-sectional observational study in a single academic medical center. PARTICIPANTS, MEASUREMENTS: The authors investigated the circadian rest-activity cycle of six moderately demented patients with KP who wore an activity/lux monitor for 10-26 days and compared these patterns with those of six home-living healthy individuals of the same age group. In addition, rest-activity cycle data from previous studies of patients with AD were examined. INTERVENTIONS: None. RESULTS: The rest-activity cycle of KP was remarkably well entrained, without the marked circadian and sleep disturbances found in patients with AD on the same ward. KP had a >2 hour earlier bedtime and rest onset than healthy subjects and a 30-minute earlier wake-up time, resulting in longer nocturnal rest duration. The major difference was a greatly diminished daytime activity level and extremely low light exposure. CONCLUSION: A stably entrained, although low-amplitude and phase-advanced rest-activity cycle may reflect the different neuropathology of demented patients with KP compared with patients with AD.
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Síndrome de Korsakoff/complicações , Atividade Motora , Descanso , Idoso , Ritmo Circadiano , Estudos Transversais , Feminino , Humanos , Iluminação , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Transtornos do Sono do Ritmo Circadiano/complicaçõesRESUMO
The provision of palliative care in psychiatry and the use of coercion in palliative care are underexplored areas. We report the case of a 65-year-old woman with cerebral metastatic breast cancer who was compulsorily admitted from a specialized palliative care ward to a psychiatric inpatient ward in Zurich, Switzerland. While in specialized inpatient palliative care, the patient had resisted palliative care but was found to lack decision-making capacity for her treatment due to disordered thought process and paranoid delusions. Under our care, which involved coercive treatment in the form of concealed administration of an antipsychotic, the patient's psychiatric symptoms improved. She regained decision-making capacity, was granted discharge from hospital, and ended her life by assisted suicide on the day of discharge.
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BACKGROUND: In 2018, Switzerland introduced a nationwide case-based prospective remuneration system (TARPSY), with decreasing daily rates for reimbursement of inpatient care in mental health facilities. Initially, there were concerns that declining daily rates could result in early discharges and increased readmission rates. METHODS: We compared length of stay (LOS) and readmission rates for patients in adult and geriatric psychiatry treatment at four psychiatric hospitals between 2017 (the last year with the traditional remuneration system) and 2018 (the first year with TARPSY). RESULTS: A total of 26,324 treatment episodes of 15,464 patients were analysed. The reduction of average LOS was not statistically significant in the first year after the implementation of TARPSY, neither in adult (mean –0.6 days, 95% confidence interval [CI] –1.6 to 0.4; p = 0.226) nor in geriatric psychiatry (mean −1.6 days, 95% CI −3.8 to 0.7; p = 0.178). When compared with the traditional remuneration system with fixed daily rates, the readmission risk was statistically significantly reduced by −9.1% (95% CI −4.9 to −13.1%; p <0.001) in adult psychiatry but not in geriatric psychiatry (−6.8%, 95% CI −19.2 to 7.4%; p = 0.329). CONCLUSIONS: If being evident at all, the effects of the new remuneration system TARPSY on LOS and readmission rates seem to be small. Concerns that declining daily rates in TARPSY would result in early discharges and increased readmission rates did not prove true in adult and geriatric psychiatry.  .
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Hospitais Psiquiátricos , Readmissão do Paciente , Adulto , Idoso , Humanos , Tempo de Internação , Estudos Prospectivos , Remuneração , SuíçaRESUMO
Recognition of Psychiatric Symptoms in Inpatient Long-Term Care Abstract. As part of the Swiss national strategy on dementia, we investigated to which extent the needs assessment instruments RAI and BESA can early detect symptoms of depression, delirium, and behavioral and psychological symptoms of dementia (BPSD) in long-term care facilities. While we decided that the RAI sufficiently detected depressive symptoms, we suggest to add the two-questions-test and the geriatric depression scale to the BESA assessment. The BESA evaluation had more targeted focused assessments, allowing for better identification of delirium. Neither RAI or BESA cover the whole spectrum of behavioral and psychological symptoms of dementia. We consider the continuous application of these assessment instruments an important step towards interdisciplinary exchange and a better treatment of residents with psychiatric symptoms.
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Delírio , Demência , Depressão , Idoso , Delírio/diagnóstico , Demência/diagnóstico , Depressão/diagnóstico , Humanos , Pacientes Internados , Assistência de Longa DuraçãoRESUMO
We present the case of a 77-year-old patient with a rapid onset of delusions, amnesia, agitation, insomnia and no previous psychiatric history, who was diagnosed with anti-N-methyl-d-aspartate receptor encephalitis. This case report highlights the importance of including autoimmune encephalitis in the differential diagnosis of older patients presenting with rapid onset psychiatric episodes.
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Encefalite Antirreceptor de N-Metil-D-Aspartato/diagnóstico , Receptores de N-Metil-D-Aspartato/imunologia , Doença Aguda , Idoso , Amnésia/etiologia , Encefalite Antirreceptor de N-Metil-D-Aspartato/líquido cefalorraquidiano , Encefalite Antirreceptor de N-Metil-D-Aspartato/tratamento farmacológico , Delusões/etiologia , Diagnóstico Diferencial , Humanos , Imunoglobulina A/administração & dosagem , Masculino , Agitação Psicomotora/etiologiaRESUMO
Delirium is a frequent condition in patients in a palliative care situation and most often associated with substantial burden or even danger for the persons concerned as well as caregivers and health-care-professionals. Despite the lack of randomized-controlled-trials (RCTs) benzodiazepines and neuroleptic agents are used extensively in palliative care for the pharmacological management of delirium. A focused review for RCTs assessing pharmacotherapy with benzodiazepines and neuroleptics for the treatment of delirium in patients treated in a palliative care or hospice setting published in 2017 was performed in PubMed. A narrative summary of the findings of the RCTs and practical recommendation are presented. Of 42 publications, two RCTs could be included. One trial assessed the use of lorazepam (in addition to haloperidol) in case of agitation, the other placebo or risperidone or haloperidol in delirious palliative care patients. Neither risperidone nor haloperidol were superior compared to placebo, but were associated with higher mortality and morbidity. Lorazepam (along with haloperidol) reduced agitation in patients with delirium compared to placebo (along with haloperidol), but was unable to reduce the severity and incidence of delirium. It is of importance to note that psychopharmacotherapy with antipsychotics is mainly indicated for the hyperactive form of delirium and psychotic symptoms (e.g., delusions or hallucinations) in the hyper- and hypoactive delirium. Severe agitation and aggressivity can be an indication for neuroleptics, when non-pharmacological interventions fail, whereas the use of benzodiazepines has to be limited to critical situations where neuroleptics cannot be applied and cases of delirium due to alcohol withdrawal. Both substances can aggravate, precipitate or mask delirium, result adverse events with substantial distress or unfavorable survival outcomes for the patients. Thus, they should only be used in severely symptomatic patients and the duration of the medication has to be limited in time. When delirium symptoms decay the psychopharmacotherapy has to be tapered. More important than psychopharmacotherapy, the thorough investigation and treatment of potentially reversible causes of delirium (e.g., pharmacotherapy, infection) and the routine identification of patients at risk for delirium along with prophylactic measures are essential. The recently published landmarks RCTs provide moderate evidence to adopt recommendations from other medical specialties (i.e., intensive care, geriatrics) to the field of palliative care.
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Antipsicóticos/uso terapêutico , Benzodiazepinas/uso terapêutico , Delírio/tratamento farmacológico , Cuidados Paliativos/métodos , Idoso , Feminino , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do TratamentoRESUMO
The nanopeptide oxytocin has physiological functions during labour and lactation. In addition, oxytocin is known to modulate aggression, anxiety, social behaviour and cognition. Little is known about its effects on memory for emotional stimuli. In the present single-blind, placebo-controlled, randomised study we have investigated the short- and long-term effects of a single post-learning dose (20 IU) of intranasal oxytocin on memory for facial identity and expression in 36 healthy young females and males using a face portrait recognition test. In the acquisition phase of the test, 60 different male faces with happy, angry or neutral expressions were presented to the volunteers. Thirty minutes and 24h after oxytocin administration, recognition memory tests were performed using portraits with neutral facial expressions, only. Oxytocin improved identity recognition memory independently of participant's gender, for neutral and angry faces, whereas this effect was not present for happy faces. Oxytocin-treated subjects had a lower bias to judge not previously seen faces as being previously seen. Oxytocin had no effect on facial expression memory. In conclusion, oxytocin has distinct effects on memory performance for facial identity and may contribute to the modulation of social behaviour.
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Face , Memória/efeitos dos fármacos , Ocitocina/farmacologia , Administração Intranasal , Adolescente , Adulto , Interpretação Estatística de Dados , Expressão Facial , Feminino , Humanos , Masculino , Ocitocina/administração & dosagem , Desempenho Psicomotor/efeitos dos fármacos , Reconhecimento Psicológico/efeitos dos fármacos , Caracteres Sexuais , Método Simples-CegoRESUMO
Melatonin has been suggested to affect human emotion, but conflicting evidence exists. Therefore, we tested the effect of a single dose of a 4 mg prolonged release formulation of melatonin on a biologically based model of emotional processing. Affective modulation of acoustic white noise startle (103 dB) by emotional slides selected from the International Affective Picture System (IAPS) was assessed in 16 healthy young women twice, in a double-blind, placebo-controlled, balanced cross-over design. Melatonin significantly reduced startle responsiveness, but did not impact affective startle modulation, nor startle habituation. Melatonin significantly reduced arousal ratings and induced a parasympathetically dominated heart rate variability pattern indicative of a non-aroused state. We conclude that melatonin reduces arousal and startle responsiveness. However, no evidence for a direct emotion-modulating effect of melatonin was found in this healthy cohort.
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Afeto/efeitos dos fármacos , Nível de Alerta/efeitos dos fármacos , Habituação Psicofisiológica/efeitos dos fármacos , Melatonina/farmacologia , Reflexo de Sobressalto/efeitos dos fármacos , Adulto , Estudos Cross-Over , Preparações de Ação Retardada/farmacologia , Método Duplo-Cego , Feminino , Frequência Cardíaca/efeitos dos fármacos , Humanos , Melatonina/administração & dosagem , PlacebosRESUMO
Faces are among the most relevant social stimuli revealing an encounter's identity and actual emotional state. Deficits in facial recognition may be an early sign of cognitive decline leading to social deficits. The main objective of the present study is to investigate if individuals with amnestic mild cognitive impairment show recognition deficits in facial identity. Thirty-seven individuals with amnestic mild cognitive impairment, multiple-domain (15 female; age: 75±8 yrs.) and forty-one healthy volunteers (24 female; age 71±6 yrs.) participated. All participants completed a human portrait memory test presenting unfamiliar faces with happy and angry emotional expressions. Five and thirty minutes later, old and new neutral faces were presented, and discrimination sensitivity (d') and response bias (C) were assessed as signal detection parameters of cued facial identity recognition. Memory performance was lower in amnestic mild cognitive impairment as compared to control subjects, mainly because of an altered response bias towards an increased false alarm rate (favoring false OLD ascription of NEW items). In both groups, memory performance declined between the early and later testing session, and was always better for acquired happy than angry faces. Facial identity memory is impaired in patients with amnestic mild cognitive impairment. Liberalization of the response bias may reflect a socially motivated compensatory mechanism maintaining an almost identical recognition hit rate of OLD faces in individuals with amnestic mild cognitive impairment.