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Lawn T, Aman Y, Rukavina K, Sideris-Lampretsas G, Howard M, Ballard C, Ray Chaudhuri K, Malcangio M. Pain in the neurodegenerating brain: insights into pharmacotherapy for Alzheimer disease and Parkinson disease. Pain 2021; 162:999-1006. [PMID: 33239526 PMCID: PMC7977618 DOI: 10.1097/j.pain.0000000000002111] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/18/2020] [Accepted: 10/08/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Timothy Lawn
- Centre for Neuroimaging Sciences, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
| | - Yahyah Aman
- Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, Lørenskog, Norway
| | - Katarina Rukavina
- The Maurice Wohl Clinical Neuroscience Institute, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
- Parkinson Foundation Centre of Excellence, King's College Hospital, London, United Kingdom
| | - George Sideris-Lampretsas
- Wolfson Centre for Age Related Diseases, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
| | - Matthew Howard
- Centre for Neuroimaging Sciences, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
| | | | - Kallol Ray Chaudhuri
- The Maurice Wohl Clinical Neuroscience Institute, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
- Parkinson Foundation Centre of Excellence, King's College Hospital, London, United Kingdom
| | - Marzia Malcangio
- Wolfson Centre for Age Related Diseases, The Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
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Gagliese L, Gauthier LR, Narain N, Freedman T. Pain, aging and dementia: Towards a biopsychosocial model. Prog Neuropsychopharmacol Biol Psychiatry 2018; 87:207-215. [PMID: 28947182 DOI: 10.1016/j.pnpbp.2017.09.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/20/2017] [Accepted: 09/21/2017] [Indexed: 12/30/2022]
Abstract
Dementia is a progressive disease associated with irreversible impairment and loss of cognitive abilities. About half of older people with dementia experience pain. In this paper, we propose that pain in older people with dementia can be conceptualized as the final result of the interaction of three heterogeneous phenomena, pain, aging, and dementia, which are created and influenced by the interactions of predisposing, lifelong, and current biopsychosocial factors. We review pain assessment in people with dementia using both self-report and observational/behavioral measures. We then review the biological/sensory, psychological (cognitive and affective) and social dimensions of pain in dementia. The available data suggest that dementia does not impact pain threshold or tolerance. To date, there is little research on the social dimension of pain in dementia. Changes in the affective domain in response to experimental pain have been contradictory with evidence supporting both increased and decreased unpleasantness and emotional responsiveness in people with dementia compared to healthy controls. Clinically, depression is a significant burden for older people with dementia and chronic pain. The relationship between pain and other neuropsychiatric symptoms is controversial, and there is insufficient evidence on which to base conclusions. Some of the most important dementia-related changes may arise in the cognitive domain, including impairments of semantic and episodic memory for pain, executive function, and pain anticipation. Changes in brain activation and interconnectivity support many of these conclusions. Despite methodological limitations, we conclude there are compelling preliminary data to support a biopsychosocial framework of pain and dementia. Future research directions, especially the need for improved assessment tools, are highlighted.
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Affiliation(s)
- Lucia Gagliese
- School of Kinesiology and Health Science, York University, 4700 Keele St., Toronto M3J 1P3, Canada; Department of Anesthesia & Pain Management, Toronto General Hospital, Canada; Department of Supportive Care, Princess Margaret Cancer Centre, Canada; Campbell Family Cancer Research Institute, Ontario Cancer Institute, University Health Network, 200 Elizabeth St., Toronto M5G 2C5, Canada; Department of Anesthesia, Mount Sinai Hospital, 600 University Ave, Toronto M5G 1X5, Canada; Faculty of Medicine, University of Toronto, 1 King's College Cir #3172, Toronto M5S 1A8, Canada; Department of Psychiatry, Toronto General Hospital, Canada.
| | - Lynn R Gauthier
- Department of Family and Emergency Medicine, Faculty of Medicine, Université Laval, 1050 Avenue de la Médecine, Québec G1V 0A6, Canada; l'Équipe de recherche Michel-Sarrazin en oncologie psychosociale et soins palliatifs, Canada; CHU de Québec-Université Laval Research Center, Oncology Research Axis, Canada; Université Laval Cancer Research Center, 9 Rue McMahon, Québec G1R 3S3, Canada
| | - Nadine Narain
- Department of Anesthesia & Pain Management, Toronto General Hospital, Canada
| | - Tamlyn Freedman
- Department of Anesthesia & Pain Management, Toronto General Hospital, Canada
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Güven A, Altınkaynak M, Dolu N, Ünlühızarcı K. Advanced analysis of auditory evoked potentials in hyperthyroid patients: the effect of filtering. J Med Syst 2015; 39:13. [PMID: 25637540 DOI: 10.1007/s10916-014-0184-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 12/29/2014] [Indexed: 11/26/2022]
Abstract
The purpose of the study is to evaluate Auditory Evoked Potentials (AEPs) in patients with hyperthyroidism and to compare their frequency components with those of healthy subjects. In this study the AEPs in hyperthyroidism were studied both in time and frequency domains rather than studying just in the time domain by peak scoring. This paper presents a method for filtering auditory oddball standard and target AEPs by using singular spectrum analysis (SSA) and feature extraction in the frequency domain via spectral analysis. AEPs were recorded during an auditory oddball paradigm in 25 newly diagnosed hyperthyroid patients and 15 healthy subjects. The signals are captured in the presence of ongoing background EEG activity so they are often contaminated by artifacts. This paper presents a method for filtering auditory odd-ball standard and target AEPs by using Singular spectrum analysis and feature extraction in frequency domain via spectral analysis. Information about the frequency composition of the signal is then used to compare normal and hyperthyroid states. While there was no significant difference either in the target or standard unfiltered signals between the hyperthyroid patients and the control group (p > 0.05), there was a significant difference in the filtered signals between the two groups (p < 0.01). In conclusion, our results revealed that SSA is an effective filtering method for AEPs. Thus, a much more objective and specific examination method was developed.
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Affiliation(s)
- Ayşegül Güven
- Department of Biomedical Engineering, Engineering Faculty, Erciyes University, Melikgazi, 38039, Kayseri, Turkey,
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