Feasibility Study of Transcranial Ultrasound Stimulation on Alzheimer's Disease Patients

Author(s):  
2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Francisca Monteiro ◽  
Ioannis Sotiropoulos ◽  
Óscar Carvalho ◽  
Nuno Sousa ◽  
Filipe S. Silva

AbstractAlzheimer’s disease (AD) is the most common cause of dementia, affecting approximately 40 million people worldwide. The ineffectiveness of the available pharmacological treatments against AD has fostered researchers to focus on alternative strategies to overcome this challenge. Mechanical vibrations delivered in different stimulation modes have been associated with marked improvements in cognitive and physical performance in both demented and non-demented elderly. Some of the mechanical-based stimulation modalities in efforts are earlier whole-body vibration, transcranial ultrasound stimulation with microbubble injection, and more recently, auditory stimulation. However, there is a huge variety of treatment specifications, and in many cases, conflicting results are reported. In this review, a search on Scopus, PubMed, and Web of Science databases was performed, resulting in 37 papers . These studies suggest that mechanical vibrations delivered through different stimulation modes are effective in attenuating many parameters of AD pathology including functional connectivity and neuronal circuit integrity deficits in the brains of AD patients, as well as in subjects with cognitive decline and non-demented older adults. Despite the evolving preclinical and clinical evidence on these therapeutic modalities, their translation into clinical practice is not consolidated yet. Thus, this comprehensive and critical systematic review aims to address the most important gaps in the reviewed protocols and propose optimal regimens for future clinical application.


2019 ◽  
Author(s):  
R. Beisteiner ◽  
E. Matt ◽  
C. Fan ◽  
H. Baldysiak ◽  
M. Schönfeld ◽  
...  

AbstractUltrasound-based brain stimulation techniques offer an exciting potential to modulate the human brain in a highly focal and precisely targeted manner. However, for clinical applications the current techniques have to be further developed. We introduce a new ultrasound stimulation technique, based on single ultrashort ultrasound pulses (transcranial pulse stimulation, TPS) and describe a first navigable clinical TPS system. Feasibility, safety and preliminary (uncontrolled) efficacy data in Alzheimer’s disease (AD) are provided. Simulation data,in vitromeasurements with rat and human skulls/brains and clinical data in 35 AD patients were acquired in a multicentric setting (including CERAD scores and functional MRI). Preclinical results show large safety margins and patient results show high treatment tolerability. Neuropsychological scores improved significantly when tested immediately as well as 1 and 3 months after stimulation and fMRI data displayed significant connectivity increases within the memory network. The results encourage broad neuroscientific application and translation of the new method to clinical therapy and randomized sham-controlled studies.


2018 ◽  
Vol 13 (2) ◽  
pp. 97-99 ◽  
Author(s):  
Joanne Marie Muellenbach

A Review of: Rimkeit, B.S. and Claridge, G. (2017). Peer reviewed: literary Alzheimer’s, a qualitative feasibility study of dementia-friendly book groups. New Zealand Library & Information Management Journal, 56(2), 14-22. https://figshare.com/articles/Literary_Alzheimer_s_A_qualitative_feasibility_study_of_dementia-friendly_book_groups/5715052/1   Abstract Objective – To explore how people living with dementia experience reading classic fiction in book groups and what benefits this intervention provides.  Design – Qualitative feasibility study. Setting – Day centre within a care home in the North Island of New Zealand. Subjects – Eight participants with a medical diagnosis of dementia – four community dwellers who attend day centers, and four residents of a secure dementia unit in a care home. Methods – Investigators used surveys, focus groups, and interpretative phenomenological analysis (IPA), for ideographic analysis of the data.  Main results – Following analysis of the focus book group data, three superordinate, with related subordinate, themes were found: 1) the participant as a lively reader. The participants shared childhood memories of reading and when they became adults, how they encouraged reading within the household and with their own children. Subordinate themes included: recall, liveliness of discussion, and interest in reading and book clubs; 2) the participant as guardian of the voice of Dickens. Participants believed that, when the language is simplified, the beauty and rich imagery of Dickens is lost. Subordinate themes included: oversimplifying “loses the voice of Dickens”, familiarity, and continued play on words; and 3) the participant as a discerning book reviewer. The participants offered a number of ‘dementia-friendly’ suggestions, including the use of memory aids and simplifying text. Subordinate themes were expressed as four recommendations: use cast of characters; illustrations pick up the energy of the story, but balance quantity with risk of being childish; the physical quality of the text and paper; and chunk quantity of text while keeping the style of the original author. The choice of using classic fiction that was already well known was validated by the participants, who had some preconceptions about Ebenezer Scrooge, and described him by using epithets such as mean, an old bastard, and ugly. The participants found the investigators’ adapted version to be oversimplified, as short excerpts of the original Dickens seemed to evoke emotional and aesthetic responses of appreciation. Therefore, when creating adaptations, it is important to preserve the beauty of the original writing as much as possible. Conclusion – This qualitative feasibility study has provided a better understanding of how people living with dementia experience classic fiction in shared book groups. For individuals with Alzheimer’s disease, language skills may be well-preserved until later in the disease course. For example, the focus group participants demonstrated an appreciation and command of language, as well as enthusiasm and excitement in the sharing of the original Dickens with others. They suggested the use of memory aids, such as including a cast of characters, and repeating the referent newly on each page. Participants also suggested that the adapted version be shortened, to use a large font, and to include plenty of pictures. The choice of using classic fiction was validated by the participants, as they found these tales comforting and familiar, particularly when they included such colorful characters as Ebenezer Scrooge. Finally, people living with dementia should be encouraged to enjoy books for the same reason other adults love to read – primarily for the creative process. Classic fiction may be adapted to enhance readability, but the adaptation must be done in a thoughtful manner. While memory deficits occur in Alzheimer’s disease, an appreciation of complex language may be preserved until the later disease stages.


2015 ◽  
Vol 44 (suppl 2) ◽  
pp. ii23.4-ii24
Author(s):  
C. Richardson ◽  
J. Rusted ◽  
N. Tabet

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