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Nadeau SE. Lecanemab Questions. Neurology 2024; 102:e209320. [PMID: 38484213 DOI: 10.1212/wnl.0000000000209320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/05/2024] [Indexed: 03/19/2024] Open
Abstract
The recently published results of the 18-month randomized controlled trial of lecanemab, reporting the efficacy of the drug in slowing the progression of early Alzheimer disease, quickly led to approval by the FDA and widespread acceptance of lecanemab treatment. However, there are a number of matters that deserve further consideration. The success of blinding was not assessed, even as infusion reactions and the cerebral pathology underlying amyloid-related imaging abnormalities could have signaled to many participants that they were on drug, potentially exerting a potent placebo effect. The value of the outcome to participants is not defined in the absolute terms necessary for clinical decision-making, and the difference attributable to lecanemab was between 18% and 46% of estimates of the minimal clinically important difference on the Clinical Dementia Rating Scale Sum of Boxes. The attenuation of change on the Alzheimer's Disease Assessment Scale-Cognitive 14 achieved by lecanemab at 18 months was 50% of that achieved by donepezil at 6 months. Lecanemab treatment imposes a high treatment burden. The fact that the burden commences at the initiation of lecanemab treatment, whereas the benefit accrues years later requires us to take into account value discounting over time, which would significantly reduce the benefit/burden ratio. Finally, treatment with monoclonal antibodies to cerebral amyloid has consistently been associated with progressive cerebral atrophy. At the least, these issues should be raised in treatment discussions with patients. They also suggest a need to very seriously reconsider how we evaluate clinical trial results preparatory to translating them into clinical practice. Some suggestions are provided.
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Affiliation(s)
- Stephen E Nadeau
- From the Neurology Service and the Brain Rehabilitation Research Center, Malcom Randall VA Medical Center; Department of Neurology, University of Florida College of Medicine, Gainesville, FL
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2
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Dávila G, Berthier ML. Are pharmacotherapeutics effective for treating aphasia? Expert Rev Neurother 2024; 24:267-271. [PMID: 38323346 DOI: 10.1080/14737175.2024.2313557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/30/2024] [Indexed: 02/08/2024]
Abstract
INTRODUCTION Aphasia is a communication disorder resulting from stroke and/or neurodegenerative conditions which involve the left cerebral hemisphere. It is a debilitating disorder affecting a person's ability to speak, understand, read, and write. Its impact on daily life necessitates therapeutic strategies to aid patients with aphasia. AREAS COVERED In this special report, the authors speculate whether current pharmacotherapeutic strategies are effective in treating aphasia. The authors look at aphasia caused by different conditions and how this could impact therapy before providing the reader with their expert perspectives. The aim of this paper is for the reader to gain a clearer understanding of the efficacy of the current pharmacotherapeutic treatment paradigms as well as potential future developments. EXPERT OPINION The exploration of pharmacotherapy for aphasia in vascular brain disorders and neurodegenerative diseases has received much attention in recent years with various therapeutic strategies having been put forward. In terms of whether pharmacotherapy is effective for the treatment of aphasia, there is still no clear-cut answer. Further research is needed with more studies requiring a greater emphasis on language and communication deficits. Biomarkers may also help clinicians provide their patients with a more personalized treatment plan.
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Affiliation(s)
- Guadalupe Dávila
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Málaga, Málaga, Spain
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Málaga, Málaga, Spain
- Department of Psychobiology and Methodology of Behavioral Sciences, Faculty of Psychology and Speech Therapy, University of Málaga, Málaga, Spain
- Instituto de Investigación Biomédica de Málaga (IBIMA) - Plataforma Bionand, Málaga, Spain
| | - Marcelo L Berthier
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Málaga, Málaga, Spain
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Málaga, Málaga, Spain
- Instituto de Investigación Biomédica de Málaga (IBIMA) - Plataforma Bionand, Málaga, Spain
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3
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Dávila G, Torres-Prioris MJ, López-Barroso D, Berthier ML. Turning the Spotlight to Cholinergic Pharmacotherapy of the Human Language System. CNS Drugs 2023; 37:599-637. [PMID: 37341896 PMCID: PMC10374790 DOI: 10.1007/s40263-023-01017-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 06/22/2023]
Abstract
Even though language is essential in human communication, research on pharmacological therapies for language deficits in highly prevalent neurodegenerative and vascular brain diseases has received little attention. Emerging scientific evidence suggests that disruption of the cholinergic system may play an essential role in language deficits associated with Alzheimer's disease and vascular cognitive impairment, including post-stroke aphasia. Therefore, current models of cognitive processing are beginning to appraise the implications of the brain modulator acetylcholine in human language functions. Future work should be directed further to analyze the interplay between the cholinergic system and language, focusing on identifying brain regions receiving cholinergic innervation susceptible to modulation with pharmacotherapy to improve affected language domains. The evaluation of language deficits in pharmacological cholinergic trials for Alzheimer's disease and vascular cognitive impairment has thus far been limited to coarse-grained methods. More precise, fine-grained language testing is needed to refine patient selection for pharmacotherapy to detect subtle deficits in the initial phases of cognitive decline. Additionally, noninvasive biomarkers can help identify cholinergic depletion. However, despite the investigation of cholinergic treatment for language deficits in Alzheimer's disease and vascular cognitive impairment, data on its effectiveness are insufficient and controversial. In the case of post-stroke aphasia, cholinergic agents are showing promise, particularly when combined with speech-language therapy to promote trained-dependent neural plasticity. Future research should explore the potential benefits of cholinergic pharmacotherapy in language deficits and investigate optimal strategies for combining these agents with other therapeutic approaches.
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Affiliation(s)
- Guadalupe Dávila
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Malaga, Marqués de Beccaria 3, 29010, Malaga, Spain
- Instituto de Investigación Biomédica de Malaga-IBIMA, Malaga, Spain
- Department of Psychobiology and Methodology of Behavioral Sciences, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
| | - María José Torres-Prioris
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Malaga, Marqués de Beccaria 3, 29010, Malaga, Spain
- Instituto de Investigación Biomédica de Malaga-IBIMA, Malaga, Spain
- Department of Psychobiology and Methodology of Behavioral Sciences, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
| | - Diana López-Barroso
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Malaga, Marqués de Beccaria 3, 29010, Malaga, Spain
- Instituto de Investigación Biomédica de Malaga-IBIMA, Malaga, Spain
- Department of Psychobiology and Methodology of Behavioral Sciences, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain
| | - Marcelo L Berthier
- Cognitive Neurology and Aphasia Unit, Centro de Investigaciones Médico-Sanitarias, University of Malaga, Marqués de Beccaria 3, 29010, Malaga, Spain.
- Instituto de Investigación Biomédica de Malaga-IBIMA, Malaga, Spain.
- Language Neuroscience Research Laboratory, Faculty of Psychology and Speech Therapy, University of Malaga, Malaga, Spain.
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Koller EJ, Chakrabarty P. Tau-Mediated Dysregulation of Neuroplasticity and Glial Plasticity. Front Mol Neurosci 2020; 13:151. [PMID: 32973446 PMCID: PMC7472665 DOI: 10.3389/fnmol.2020.00151] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/20/2020] [Indexed: 01/14/2023] Open
Abstract
The inability of individual neurons to compensate for aging-related damage leads to a gradual loss of functional plasticity in the brain accompanied by progressive impairment in learning and memory. Whereas this loss in neuroplasticity is gradual during normal aging, in neurodegenerative diseases such as Alzheimer’s disease (AD), this loss is accelerated dramatically, leading to the incapacitation of patients within a decade of onset of cognitive symptoms. The mechanisms that underlie this accelerated loss of neuroplasticity in AD are still not completely understood. While the progressively increasing proteinopathy burden, such as amyloid β (Aβ) plaques and tau tangles, definitely contribute directly to a neuron’s functional demise, the role of non-neuronal cells in controlling neuroplasticity is slowly being recognized as another major factor. These non-neuronal cells include astrocytes, microglia, and oligodendrocytes, which through regulating brain homeostasis, structural stability, and trophic support, play a key role in maintaining normal functioning and resilience of the neuronal network. It is believed that chronic signaling from these cells affects the homeostatic network of neuronal and non-neuronal cells to an extent to destabilize this harmonious milieu in neurodegenerative diseases like AD. Here, we will examine the experimental evidence regarding the direct and indirect pathways through which astrocytes and microglia can alter brain plasticity in AD, specifically as they relate to the development and progression of tauopathy. In this review article, we describe the concepts of neuroplasticity and glial plasticity in healthy aging, delineate possible mechanisms underlying tau-induced plasticity dysfunction, and discuss current clinical trials as well as future disease-modifying approaches.
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Affiliation(s)
- Emily J Koller
- Department of Neuroscience, University of Florida, Gainesville, FL, United States.,Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States
| | - Paramita Chakrabarty
- Department of Neuroscience, University of Florida, Gainesville, FL, United States.,Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States.,McKnight Brain Institute, University of Florida, Gainesville, FL, United States
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5
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Archer B, Azios JH, Müller N, Macatangay L. Effect Sizes in Single-Case Aphasia Studies: A Comparative, Autocorrelation-Oriented Analysis. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2019; 62:2473-2482. [PMID: 31260377 DOI: 10.1044/2019_jslhr-l-18-0186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Purpose In single-case treatment studies, researchers may compare client performance during a baseline, nontreatment phase(s) to client performance during intervention phases. Autocorrelation in the data series gathered during such studies increases the likelihood that analysts will detect or fail to detect meaningful differences between baseline and treatment phase data. We examined the impact that autocorrelation has on 4 effect size calculation methods when these methods are applied to data generated by people with aphasia during anomia treatment studies. The effect sizes we selected were Busk and Serlin's d, Young's C, nonoverlap of all pairs, and Tau-U. We hypothesized that d and C would be influenced by autocorrelation, whereas nonoverlap of all pairs and Tau-U would not. Method We extracted 173 highly autocorrelated data series from published investigations of treatments for anomia. These data series were then "cleansed" of autocorrelation through the use of an autoregressive integrated moving average (ARIMA) process. The 4 effect size calculation methods were used to derive an effect size for each published and each corresponding ARIMA-tized data series. The published and ARIMA-tized effect sizes associated with each calculation method were then compared. Results For all of the 4 effect sizes, statistically significant differences existed between the published effect sizes and the ARIMA-tized effect sizes. Conclusions All 4 of the methods were influenced by autocorrelation. Further research that develops effect size calculation methods that are not influenced by autocorrelation will help to improve the quality of single-case studies. Supplemental Material https://doi.org/10.23641/asha.8298530.
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Affiliation(s)
- Brent Archer
- Department of Communication Sciences and Disorders, Bowling Green State University, OH
| | - Jamie H Azios
- Department of Speech and Hearing Sciences, Lamar University, Beaumont, TX
| | - Nicole Müller
- Department of Speech and Hearing Sciences, University College Cork, Ireland
| | - Lauren Macatangay
- Department of Communication Sciences and Disorders, Bowling Green State University, OH
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Park J, Im JJ, Song IU, Kang Y. A Comparison of Memory Beliefs, Cognitive Activity, and Depression Among Healthy Older Adults, Amnestic Mild Cognitive Impairment, and Patient with Alzheimer's Disease. Ann Geriatr Med Res 2019; 23:16-19. [PMID: 32743280 PMCID: PMC7387599 DOI: 10.4235/agmr.18.0051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 02/18/2019] [Accepted: 02/25/2019] [Indexed: 11/24/2022] Open
Abstract
Background Amnestic mild cognitive impairment (aMCI) is highly likely to progress to dementia of the Alzheimer type (DAT). One of the most frequently reported symptoms in aMCI and DAT patients is memory impairment. This study compared the levels of beliefs about memory efficacy and control, cognitive activity, and depression among healthy older adults (OA), patients with aMCI, and patients with DAT. Methods This study included 21 OA (11 males, 10 females), 16 aMCI patients (6 males, 10 females), and 18 DAT patients (10 males, 8 females). The memory efficacy questionnaire, memory control questionnaire, cognitive activity questionnaire, depression questionnaire, and Seoul Verbal Learning Test were administered to all subjects. Results DAT patients showed significantly lower scores on the recognition test than did the OA and aMCI patients, and no difference in these scores was observed between the OA and aMCI patients. Regarding the memory efficacy, memory control, and cognitive activity questionnaires, DAT and aMCI patients showed significantly lower scores than did OA. However, there were no differences in these scores between aMCI and DAT patients. Conclusion The results of this study suggest that aMCI patients experienced impairment in memory beliefs and memory control in the same way as DAT patients did. These results suggest that the early application of cognitive rehabilitation therapy for patients with aMCI may be effective in preventing or alleviating memory deterioration.
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Affiliation(s)
- JongSik Park
- Department of Neurology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
| | - Jooyeon Jamie Im
- Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
| | - In-Uk Song
- Department of Neurology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
| | - Yeonwook Kang
- Depratment of Psychology, Hallym University, Chuncheon, Korea.,Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
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7
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Bajpai S, Tripathi M, Pandey RM, Dey AB, Nehra A. Development and validation of Cognitive Training Intervention for Alzheimer's disease (CTI-AD): A picture-based interventional program. DEMENTIA 2018; 19:1203-1219. [PMID: 30180764 DOI: 10.1177/1471301218797043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Introduction Alzheimer’s disease is a gradual and progressive disorder which cripples the person’s functionality due to cognitive decline. Many clinicopathological and pharmacological therapy has the potential to slow down the progression of the disease but has limited efficacy. One complimentary approach that has emerged is cognitive training interventions which have shown synergistic effect with the drug therapy. Nevertheless, many cognitive interventions lack on specificities of the intervention due to which its efficacy gets scrutinized. Objective To describe the foundation, content, and development of Cognitive Training Intervention for Alzheimer’s disease (CTI-AD) along with the treatment feasibility based on a pilot study. Materials and methods A culture-specific picture-based eight weeks cognitive training manual was developed based on extensive review and focused group discussions. It was standardized on 63 older participants (48 healthy controls (HC); 15 early Alzheimer’s disease cases). Results All the tasks were progressive in nature and were found effective in discriminating the cognitive performance of early Alzheimer’s disease and HC throughout the intervention period. Moreover, it also improved early Alzheimer’s disease performance on the memory (HC: 1st week/8th week = 21.6 ± 5.7/57.3 ± 19.0; early Alzheimer’s disease: 1st week/8th week = 48.5 ± 22.9/60.5 ± 21.8); attention (HC: 1st week/8th week = 90.2 ± 18.0/196.9 ± 28.0; early Alzheimer’s disease: 1st week/8th week = 216.6 ± 78.2/286.8 ± 87.0) and language (HC: 1st week/8th week = 29.8 ± 9.4/115.3 ± 31.1; early Alzheimer’s disease: 1st week/8th week = 211.8 ± 68.4/270.4 ± 104.9) domains, respectively, from the baseline level. Conclusion The current manual (CTI-AD) is one of the first promising non-pharmacological program developed nationally with a strong theoretical base to cater to the tertiary needs of the older adults with early Alzheimer’s disease.
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Affiliation(s)
- Swati Bajpai
- Department of Clinical Neuropsychology, All India Institute of Medical Sciences, New Delhi, India
| | - Manjari Tripathi
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - R M Pandey
- Department of Bio-Statistics, All India Institute of Medical Sciences, New Delhi, India
| | - A B Dey
- Department of Geriatric Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Ashima Nehra
- Department of Clinical Neuropsychology, All India Institute of Medical Sciences, New Delhi, India
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Morello ANDC, Lima TM, Brandão L. Language and communication non-pharmacological interventions in patients with Alzheimer's disease: a systematic review. Communication intervention in Alzheimer. Dement Neuropsychol 2017; 11:227-241. [PMID: 29213519 PMCID: PMC5674666 DOI: 10.1590/1980-57642016dn11-030004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Alzheimer's disease considerably compromises communication skills. Language changes become more prominent as the disease progresses. Deterioration of language and cognition reduces the ability of holding conversations, which has a negative impact on social interaction.
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Affiliation(s)
| | - Tatiane Machado Lima
- Instituto de Psicologia, Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre, RS, Brazil
| | - Lenisa Brandão
- Departamento de Saúde e Comunicação Humana, Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre, RS Brazil
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Murray LL, Paek EJ. Behavioral/Nonpharmacological Approaches to Addressing Cognitive-Linguistic Symptoms in Individuals With Dementia. ACTA ACUST UNITED AC 2016. [DOI: 10.1044/persp1.sig15.12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Despite current barriers to developing and implementing nonpharmacological or behavioral cognitive-linguistic treatments for dementia, a growing evidence base indicates that individuals with dementia may indeed benefit from a range of nonpharmacological intervention approaches in terms of helping them maintain and/or improve their language and cognitive abilities as well as general functioning and emotional well being. With respect to the current dementia literature, this article describes restorative and compensatory approaches for cognitive symptoms, including direct stimulation of cognitive functions and internal and external strategies to maximize use of residual cognitive skills. We also summarize various language treatment techniques designed to address word retrieval deficits or functional communication issues in a range of dementia types and severity. Broader stimulation approaches such as Montessori-based treatment, reminiscence therapy, and exercise/movement therapy are also reviewed given their potential to benefit not only the cognitive-linguistic symptoms of individuals with dementia, but also other aspects of physical, emotional, and behavioral functioning. Last, we conclude by highlighting limitations in the current research literature along with factors to consider for maximizing nonpharmacological treatment effects (i.e., generalization and maintenance of treatment gains) in clinical or research settings.
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Affiliation(s)
- Laura L. Murray
- Department of Speech and Hearing Sciences, Indiana University
Bloomington, IN
| | - Eun Jin Paek
- Department of Speech and Hearing Sciences, Indiana University
Bloomington, IN
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Crosson B, McGregor KM, Nocera JR, Drucker JH, Tran SM, Butler AJ. The relevance of aging-related changes in brain function to rehabilitation in aging-related disease. Front Hum Neurosci 2015; 9:307. [PMID: 26074807 PMCID: PMC4444823 DOI: 10.3389/fnhum.2015.00307] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/12/2015] [Indexed: 12/29/2022] Open
Abstract
The effects of aging on rehabilitation of aging-related diseases are rarely a design consideration in rehabilitation research. In this brief review we present strong coincidental evidence from these two fields suggesting that deficits in aging-related disease or injury are compounded by the interaction between aging-related brain changes and disease-related brain changes. Specifically, we hypothesize that some aphasia, motor, and neglect treatments using repetitive transcranial magnetic stimulation (rTMS) or transcranial direct current stimulation (tDCS) in stroke patients may address the aging side of this interaction. The importance of testing this hypothesis and addressing the larger aging by aging-related disease interaction is discussed. Underlying mechanisms in aging that most likely are relevant to rehabilitation of aging-related diseases also are covered.
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Affiliation(s)
- Bruce Crosson
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Neurology, Emory University Atlanta, GA, USA ; Department of Psychology, Georgia State University Atlanta, GA, USA ; School of Health and Rehabilitation Sciences, University of Queensland Brisbane, Qld, Australia
| | - Keith M McGregor
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Neurology, Emory University Atlanta, GA, USA
| | - Joe R Nocera
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Neurology, Emory University Atlanta, GA, USA
| | - Jonathan H Drucker
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Neurology, Emory University Atlanta, GA, USA ; Department of Psychology, Emory University Atlanta, GA, USA
| | - Stella M Tran
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Psychology, Georgia State University Atlanta, GA, USA
| | - Andrew J Butler
- Department of Veterans Affairs Rehabilitation Research and Development Center of Excellence for Visual and Neurocognitive Rehabilitation (151R), Atlanta VA Medical Center Decatur, GA, USA ; Department of Physical Therapy and School of Nursing and Health Professionals, Georgia State University Atlanta, GA, USA
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Reilly J. How to constrain and maintain a lexicon for the treatment of progressive semantic naming deficits: Principles of item selection for formal semantic therapy. Neuropsychol Rehabil 2015; 26:126-56. [PMID: 25609229 PMCID: PMC4760110 DOI: 10.1080/09602011.2014.1003947] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The progressive degradation of semantic memory is a common feature of many forms of dementia, including Alzheimer's disease and the semantic variant of primary progressive aphasia (svPPA). One of the most functionally debilitating effects of this semantic impairment is the inability to name common people and objects (i.e., anomia). Clinical management of a progressive, semantically based anomia presents extraordinary challenges for neurorehabilitation. Techniques such as errorless learning and spaced-retrieval training show promise for retraining forgotten words. However, we lack complementary detail about what to train (i.e., item selection) and how to flexibly adapt the training to a declining cognitive system. This position paper weighs the relative merits of several treatment rationales (e.g., restore vs. compensate) and advocates for maintenance of known words over reacquisition of forgotten knowledge in the context of semantic treatment paradigms. I propose a system for generating an item pool and outline a set of core principles for training and sustaining a micro-lexicon consisting of approximately 100 words. These principles are informed by lessons learned over the course of a Phase I treatment study targeting language maintenance over a 5-year span in Alzheimer's disease and SvPPA. Finally, I propose a semantic training approach that capitalises on lexical frequency and repeated training on conceptual structure to offset the loss of key vocabulary as disease severity worsens.
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Affiliation(s)
- Jamie Reilly
- Eleanor M. Saffran Center for Cognitive Neuroscience, Temple University, Philadelphia, Pennsylvania USA
- Department of Communication Sciences and Disorders, Temple University, Philadelphia, Pennsylvania USA
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Martin N, Kalinyak-Fliszar M. The case for single-case studies in treatment research-comments on Howard, Best and Nickels "Optimising the design of intervention studies: critiques and ways forward". APHASIOLOGY 2014; 29:570-574. [PMID: 28824217 DOI: 10.1080/02687038.2014.985884] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- Nadine Martin
- Department of Communication Sciences and Disorders, Temple University, Philadelphia, PA, USA
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Hyer L, Scott C, Lyles J, Dhabliwala J, McKenzie L. Memory intervention: the value of a clinical holistic program for older adults with memory impairments. Aging Ment Health 2014; 18:169-78. [PMID: 23889364 DOI: 10.1080/13607863.2013.819832] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVES Increasingly, cognitive training appears an asset in improving attention and working memory for older adults. We conducted a study involving a 'holistic' training program for several cohorts of older adults (N = 112), targeting community residents with a spectrum of memory complaints ranging from Age Associated Memory Impairment to mild dementia. METHOD We developed a 7-session, manualized program targeting concentration, as well as mindfulness, exercise, stress reduction, socialization, diet, and values/identity techniques. We applied this model to 11 cohorts and conducted pre- and post-testing on memory (List Learning, Story Memory, Coding, Digit Span, Recall, and Recognition) and function (Functional Assessment Questionnaire). We also divided the Memory Group by Risk Status - Low, Medium, and High. RESULTS Results showed that the Memory Clinic Group as a whole improved on this training on most scales. When broken down by risk status, the Low and Medium Risk Groups were statistically superior to the High Risk Group on cognitive measures. CONCLUSION There were differences also on adjustment, this time favoring only the Low Risk Groups. Holistic memory training seems to be impactful for older adults.
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Affiliation(s)
- Lee Hyer
- a Georgia Neurosurgical Institute , Macon , GA , USA
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Wagner AK, Brayer SW, Hurwitz M, Niyonkuru C, Zou H, Failla M, Arenth P, Manole MD, Skidmore E, Thiels E. Non-spatial pre-training in the water maze as a clinically relevant model for evaluating learning and memory in experimental TBI. Neurobiol Learn Mem 2013; 106:71-86. [PMID: 23871745 DOI: 10.1016/j.nlm.2013.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 06/11/2013] [Accepted: 07/09/2013] [Indexed: 11/17/2022]
Abstract
Explicit and implicit learning and memory networks exist where each network can facilitate or inhibit cognition. Clinical evidence suggests that implicit networks are relatively preserved after traumatic brain injury (TBI). Non-spatial pre-training (NSPT) in the Morris Water Maze (MWM) provides the necessary behavioral components to complete the task, while limiting the formation of spatial maps. Our study utilized NSPT in the MWM to assess implicit and explicit learning and memory system deficits in the controlled cortical impact (CCI) model of TBI. 76 adult male Sprague-Dawley rats were divided: CCI vs. sham surgery, NSPT vs. No-NSPT, and cued vs. non-cued groups. NSPT occurred for 4d prior to surgery (dynamic hidden platform location, extra-maze cues covered, static pool entry point). Acquisition (d14-18), Probe/Visible Platform (d19), and Reversal (d20-21) trials were conducted with or without extra-maze cues. Novel time allocation and search strategy selection metrics were utilized. Results indicated implicit and explicit learning/memory networks are distinguishable in the MWM. In the cued condition, NSPT reduced thigmotaxis, improved place learning, and largely eliminated the apparent injury-induced deficits typically observed between untrained CCI and sham rats. However, among NSPT groups, incorporation of cues into search strategy selection for CCI rats was relatively impaired compared to shams. Non-cued condition performance showed sham/NSPT and CCI/NSPT rats perform similarly, suggesting implicit memory networks are largely intact 2weeks after CCI. Place learning differences between CCI/NSPT and sham/NSPT rats more accurately reflect spatial deficits in our CCI model compared to untrained controls. These data suggest NSPT as a clinically relevant construct for evaluating potential neurorestorative and neuroprotective therapies. These findings also support development of non-spatial cognitive training paradigms for evaluating rehabilitation relevant combination therapies.
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Affiliation(s)
- Amy K Wagner
- University of Pittsburgh Department of Physical Medicine and Rehabilitation, 3471 Fifth Ave, Suite 201, Pittsburgh, PA 15213, United States; University of Pittsburgh Safar Center for Resuscitation Research, 3434 Fifth Ave, Pittsburgh, PA 15260, United States.
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Abstract
BACKGROUND During the course of Alzheimer's disease (AD), cognitive processes, including language and communication, become increasingly impaired. The aim of this review was to highlight the impact of communication deficits in AD, and discuss the need for effective treatments. METHOD PubMed was searched for studies relating to language and communication in AD. The publications identified were used as a basis for the commentary in this paper. Studies relating to the clinical effectiveness of pharmacological treatment for language and communication issues were identified systematically. RESULTS Communication deficits are common in AD. From the earliest disease stage, the patient's capacity for communication declines as problems develop with the use of language and all aspects of functional communication. There is a loss of the ability to communicate thoughts and needs, and it becomes increasingly difficult to interact socially and sustain personal relationships with caregivers, family, and friends. It is unsurprising that patients become frustrated at their loss of self-expression, and studies have demonstrated that impaired communication is strongly linked with the development of significant behavioral concerns. Overall, poor communication contributes to caregiver strain, and adds notably to the burden of disease. Clinical data and post-hoc analyses provide preliminary indications that anti-AD therapies (memantine and the cholinesterase inhibitors, ChEIs) and non-pharmacological cognitive-linguistic stimulation techniques may be helpful in addressing communication difficulties. CONCLUSIONS The capacity to treat or slow the progression of communication deficits in AD would prolong patient independence, and have a profound impact on the quality of life of patients and caregivers. The use of pharmacological (anti-AD therapies) and non-pharmacological (cognitive-linguistic stimulation) treatments may be useful management methods and warrant further investigation.
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Nadeau SE, Lu X, Dobkin B, Wu SS, Dai YE, Duncan PW. A prospective test of the late effects of potentially antineuroplastic drugs in a stroke rehabilitation study. Int J Stroke 2012; 9:449-56. [PMID: 23088350 DOI: 10.1111/j.1747-4949.2012.00920.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Accepted: 04/23/2012] [Indexed: 01/15/2023]
Abstract
BACKGROUND Extensive data, primarily from animal studies, suggest that several classes of drugs may have antineuroplastic effects that could impede recovery from brain injury or reduce the efficacy of rehabilitation. AIMS The Locomotor Experience Applied Post-Stroke trial, a randomized controlled study of 408 subjects that tested the relative efficacy of two rehabilitation techniques on functional walking level at one-year poststroke, provided us the opportunity to prospectively assess the potential antineuroplastic effects of several classes of drug. METHODS Subjects were randomized to receive one of the two rehabilitation therapies at two-months poststroke. Drugs taken were recorded at time of randomization. Outcome was assessed at one-year poststroke. Regression models were used to determine the amount of variance in success in improving functional walking level, gains in walking speed, and declines in lower extremity, upper extremity, and cognitive impairment accounted for by α1 noradrenergic blockers + α2 noradrenergic agonists, benzodiazepines, voltage-sensitive sodium channel anticonvulsants, and α2δ voltage-sensitive calcium channel blockers. RESULTS The maximum variance accounted for by any drug class was 1.66%. Drug effects were not statistically significant when using even our most lenient standard for correction for multiple comparisons. CONCLUSIONS Drugs in the classes we were able to assess do not appear to exert a clinically important effect on outcome over the period between two- and 12 months poststroke. However, the potential antineuroplastic effects of certain drugs remain an incompletely settled scientific question.
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Affiliation(s)
- Stephen E Nadeau
- Neurology Service and the Brain Rehabilitation Research Center, Malcom Randall VA Medical Center, Gainesville, FL, USA; Department of Neurology, University of Florida College of Medicine, Gainesville, FL, USA
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Reilly J, Troche J, Chatel A, Park H, Kalinyak-Fliszar M, Antonucci SM, Martin N. Lexicality Effects in Word and Nonword Recall of Semantic Dementia and Progressive Nonfluent Aphasia. APHASIOLOGY 2012; 26:404-427. [PMID: 23486736 PMCID: PMC3593303 DOI: 10.1080/02687038.2011.616926] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Verbal working memory is an essential component of many language functions, including sentence comprehension and word learning. As such, working memory has emerged as a domain of intense research interest both in aphasiology and in the broader field of cognitive neuroscience. The integrity of verbal working memory encoding relies on a fluid interaction between semantic and phonological processes. That is, we encode verbal detail using many cues related to both the sound and meaning of words. Lesion models can provide an effective means of parsing the contributions of phonological or semantic impairment to recall performance. METHODS AND PROCEDURES We employed the lesion model approach here by contrasting the nature of lexicality errors incurred during recall of word and nonword sequences by 3individuals with progressive nonfluent aphasia (a phonological dominant impairment) compared to that of 2 individuals with semantic dementia (a semantic dominant impairment). We focused on psycholinguistic attributes of correctly recalled stimuli relative to those that elicited a lexicality error (i.e., nonword → word OR word → nonword). OUTCOMES AND RESULTS Patients with semantic dementia showed greater sensitivity to phonological attributes (e.g., phoneme length, wordlikeness) of the target items relative to semantic attributes (e.g., familiarity). Patients with PNFA showed the opposite pattern, marked by sensitivity to word frequency, age of acquisition, familiarity, and imageability. CONCLUSIONS We interpret these results in favor of a processing strategy such that in the context of a focal phonological impairment patients revert to an over-reliance on preserved semantic processing abilities. In contrast, a focal semantic impairment forces both reliance upon and hypersensitivity to phonological attributes of target words. We relate this interpretation to previous hypotheses about the nature of verbal short-term memory in progressive aphasia.
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Affiliation(s)
- Jamie Reilly
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, Florida
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do Vale FDAC, Corrêa Neto Y, Bertolucci PHF, Machado JCB, da Silva DJ, Allam N, Balthazar MLF. Treatment of Alzheimer's disease in Brazil: I. Cognitive disorders. Dement Neuropsychol 2011; 5:178-188. [PMID: 29213742 PMCID: PMC5619477 DOI: 10.1590/s1980-57642011dn05030005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This article reports the recommendations of the Scientific Department of
Cognitive Neurology and Aging of the Brazilian Academy of Neurology for the
treatment of Alzheimer’s disease (AD) in Brazil, with special focus on cognitive
disorders. It constitutes a revision and broadening of the 2005 guidelines based
on a consensus involving researchers (physicians and non-physicians) in the
field. The authors carried out a search of articles published since 2005 on the
MEDLINE, LILACS and Cochrane Library databases. The search criteria were
pharmacological and non-pharmacological treatment of cognitive disorders in AD.
Studies retrieved were categorized into four classes, and evidence into four
levels, based on the 2008 recommendations of the American Academy of Neurology.
The recommendations on therapy are pertinent to the dementia phase of AD.
Recommendations are proposed for the treatment of cognitive disorders
encompassing both pharmacological (including acetyl-cholinesterase inhibitors,
memantine and other drugs and substances) and non-pharmacological (including
cognitive rehabilitation, physical activity, occupational therapy, and music
therapy) approaches. Recommendations for the treatment of behavioral and
psychological symptoms of dementia due to Alzheimer’s disease are included in a
separate article of this edition.
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Affiliation(s)
| | - Ylmar Corrêa Neto
- Federal University of Santa Catarina (UFSC), Department of Internal Medicine, Florianópolis SC, Brazil
| | | | - João Carlos Barbosa Machado
- Aurus IEPE - Institute of Research and Education on Aging of Belo Horizonte; Faculty of Medical Sciences of Minas Gerais (FCMMG), Department of Geriatric Medicine of Hospital Mater Dei, Belo Horizonte MG, Brazil
| | - Delson José da Silva
- Neurosciences Center of Hospital das Clinicas of the Federal University of Goiás (UFG). Integrated Institute of Neurosciences (IINEURO), Goiânia GO, Brazil
| | - Nasser Allam
- University of Brasilia (UnB), Laboratory of Neurosciences and Behavior, Brasília DF, Brazil
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Morelli CA, Altmann LJP, Kendall D, Fischler I, Heilman KM. Effects of semantic elaboration and typicality on picture naming in Alzheimer disease. JOURNAL OF COMMUNICATION DISORDERS 2011; 44:413-428. [PMID: 21546038 DOI: 10.1016/j.jcomdis.2011.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2009] [Revised: 12/23/2010] [Accepted: 01/05/2011] [Indexed: 05/30/2023]
Abstract
PURPOSE Individuals with probable Alzheimer disease (pAD) are frequently impaired at picture naming. This study examined whether a semantic elaboration task would facilitate naming in pAD, and whether training either semantically typical or atypical stimulus items facilitated generalized improvement in picture naming and category generation tasks. METHODS Twelve adults with mild-moderate pAD participated in the study. Participants performed an experimental semantic elaboration training task using a subset of typical items from one category and atypical items from another category. The third category, acted as a control (i.e., no items were trained). The study assessed change in category generation and a picture naming within the three target categories. RESULTS Individuals showed significantly improved category generation and naming, but changes were not limited to trained categories. Naming of trained atypical items improved significantly. Participants showed significantly improved naming of untrained typical items from categories trained with typical items. CONCLUSIONS Semantic elaboration of typical items within a semantic category can lead to generalized improvement in other typical items in the category in mild-moderate pAD. This is consistent with theories postulating that typical category items share overlapping distributed representations. Further exploration of the effects of semantic elaboration on word-finding in pAD is warranted, especially the possibility of within-category generalization.
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Nadeau SE. PRACTICE ISSUES IN NEUROLOGY. Continuum (Minneap Minn) 2010; 16:170-4. [DOI: 10.1212/01.con.0000368274.70695.cf] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
PURPOSE OF REVIEW To identify and discuss recent research studies that propose innovative psychosocial interventions in old age psychiatry. RECENT FINDINGS Studies have shown that cognitive training research for healthy elderly has advanced in several ways, particularly in the refinement of study design and methodology. Studies have included larger samples and longer training protocols. Interestingly, new research has shown changes in biological markers associated with learning and memory after cognitive training. Among mild cognitive impairment patients, results have demonstrated that they benefit from interventions displaying cognitive plasticity.Rehabilitation studies involving dementia patients have suggested the efficacy of combined treatment approaches, and light and music therapies have shown promising effects. For psychiatric disorders, innovations have included improvements in well known techniques such as cognitive behavior therapy, studies in subpopulations with comorbidities, as well as the use of new computer-aided resources. SUMMARY Research evidence on innovative interventions in old age psychiatry suggests that this exciting field is moving forward by means of methodological refinements and testing of creative new ideas.
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Lee SB, Kim KW. Nonpharmacological Interventions for Alzheimer's Disease. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2009. [DOI: 10.5124/jkma.2009.52.11.1069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Seok Bum Lee
- Department of Psychiatry, Dankook University College of Medicine, Korea.
| | - Ki Woong Kim
- Department of Psychiatry, Seoul National University College of Medicine, Korea
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