Abstract
Purpose of Review
This article discusses the diagnostic evaluation and management of reversible dementia syndromes. It highlights clinical syndromes and explores the recent literature implicating certain reversible factors in Alzheimer’s disease pathogenesis.
Recent Findings
The prevalence of fully reversible dementia is low, but there is growing awareness for potentially reversible contributors to neurodegenerative disease. In particular, exposure to anticholinergic medications, obstructive sleep apnea, and depression have emerged as potentially modifiable targets in the pathogenesis of preclinical and early Alzheimer’s disease. Treatment of these factors may not only reverse any direct cognitive effects but also prevent downstream neurodegeneration.
Summary
There is substantial opportunity to improve outcome in patients with dementia due to reversible etiologies. Even in the setting of primary neurodegenerative disease, conscientious effort is required to recognize and address reversible contributors.
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References and Recommended Reading
Wagner-Jauregg J. The treatment of dementia paralytica by malaria inoculation. 1927.
Clarfield AM. The decreasing prevalence of reversible dementias. 2003;2219–2229.
Sansing LH, Tüzün E, Ko MW, Baccon J, Lynch DR, Dalmau J. A patient with encephalitis associated with NMDA receptor antibodies. Nat Clin Pract Neuro. 2007;3:291–6.
Day GS. Reversible Dementias. CONTINUUM. 2019.
Gray SL, Anderson ML, Dublin S, Hanlon JT, Hubbard R, Walker R, et al. Cumulative use of strong anticholinergics and incident dementia: a prospective cohort study. Jama Intern Med. 2015;175:401–7.
Coupland CAC, Hill T, Dening T, Morriss R, Moore M, Hippisley-Cox J. Anticholinergic drug exposure and the risk of dementia. Jama Intern Med. 2019;179:1084–93.
1 CRB, 2 DP, 2 RP, 1 RN, 1 SB. Alzheimer’s disease and sleep disturbances: a review. 2019;77:815–824.
Y-ES J, Ooms SJ, Sutphen C, Macauley SL, Zangrilli MA, Jerome G, et al. Slow wave sleep disruption increases cerebrospinal fluid amyloid-β levels. Brain. 2017;140:2104–11.
Lucey BP, Hicks TJ, McLeland JS, Toedebusch CD, Boyd J, Elbert DL, et al. Effect of sleep on overnight cerebrospinal fluid amyloid β kinetics. Ann Neurol. 2018;83:197–204.
Ancoli-Israel S, Palmer BW, Cooke JR, Corey-Bloom J, Fiorentino L, Natarajan L, et al. Cognitive effects of treating obstructive sleep apnea in Alzheimer’s disease: a randomized controlled study. J Am Geriatr Soc. 2008;56:2076–81.
Cooke JR, Ayalon 5; Liat, Palmer PhD 2; BW, Loredo PhD 2; JS, Corey-Bloom 5; Jody, Natarajan 5; Loki, et al. Sustained use of cpap slows deterioration of cognition, sleep, and mood in patients with Alzheimer’s disease and obstructive sleep apnea: a preliminary study. 2009;5:305–9.
Troussière A-C, Charley CM, Salleron J, Richard F, Delbeuck X, Derambure P, et al. Treatment of sleep apnoea syndrome decreases cognitive decline in patients with Alzheimer’s disease. J Neurology Neurosurg Psychiatry. 2014;85:1405.
Ou NY, Tan CC, Shen NX, et al. Blood pressure and risks of cognitive impairment and dementia. Hypertension. 2020;76:217–25.
Gatchel JR, Donovan NJ, Locascio JJ, Schultz AP, Becker JA, Chhatwal J, et al. Depressive symptoms and tau accumulation in the inferior temporal lobe and entorhinal cortex in cognitively normal older adults: a pilot study. J Alzheimer’s Dis. 2017;Preprint:1–11.
Babulal GM, Ghoshal N, Head D, Vernon EK, Holtzman DM, Benzinger TLS, et al. Mood changes in cognitively normal older adults are linked to Alzheimer disease biomarker levels. Am J Geriatric Psychiatry. 2016;24:1095–104.
Donovan NJ, Locascio JJ, Marshall GA, Gatchel J, Hanseeuw BJ, Rentz DM, et al. Longitudinal association of amyloid beta and anxious-depressive symptoms in cognitively normal older adults. Am J Psychiat. 2018;175:530–7.
Krell-Roesch J, Lowe VJ, Neureiter J, Pink A, Roberts RO, Mielke MM, et al. Depressive and anxiety symptoms and cortical amyloid deposition among cognitively normal elderly persons: the Mayo Clinic Study of Aging. Int Psychogeriatr. 2018;30:245–51.
Gatchel JR, Rabin JS, Buckley RF, Locascio JJ, Quiroz YT, Yang H-S, et al. Longitudinal association of depression symptoms with cognition and cortical amyloid among community-dwelling older adults. Jama Netw Open. 2019;e198964:2.
Komaroff AL. Can Infections Cause Alzheimer Disease? Jama. 2020;324:239.
Itzhaki RF, Golde TE, Heneka MT, Readhead B. Do infections have a role in the pathogenesis of Alzheimer disease? Nat Rev. Neurol. 2020;16:193–7.
Itzhaki RF. Corroboration of a major role for herpes simplex virus type 1 in Alzheimer’s disease. Front Aging Neurosci. 2018;10:324.
Sechi E, Flanagan EP. Diagnosis and management of autoimmune dementia. Curr Treat Option Ne. 2019;21:11.
Zhou JY, Xu B, Lopes J, Blamoun J, Li L. Hashimoto encephalopathy: literature review. Acta Neurol Scand. 2017;135:285–90.
Neurosyphilis RAH. New Engl J Med. 2019;381:1358–63.
Finney AK. GR. Reversible dementias. International Review of Neurobiology. 2009:283–302.
Sutter R, Semmlack S, Kaplan PW. Nonconvulsive status epilepticus in adults — insights into the invisible. Nat Rev. Neurol. 2016;12:281–93.
Isaacs AM, Williams MA, Hamilton MG. Current update on treatment strategies for idiopathic normal pressure hydrocephalus. Curr Treat Option Ne. 2019;21:65.
Engelen M, Westhoff D, Gans J de, Nederkoorn PJ. A 64-year old man presenting with carotid artery occlusion and corticobasal syndrome: a case report. J Medical Case Reports. 2011;5:357.
Asadi-Pooya AA. Transient epileptic amnesia: a concise review. Epilepsy Behav. 2014;31:243–5.
Towne AR, Waterhouse EJ, Boggs JG, Garnett LK, Brown AJ, Smith JR, et al. Prevalence of nonconvulsive status epilepticus in comatose patients. 2000;54.
Miyaji Y, Koyama K, Kurokawa T, Mitomi M, Suzuki Y, Kuroiwa Y. Vascular corticobasal syndrome caused by unilateral internal carotid artery occlusion. J Stroke Cerebrovasc Dis. 2013;22:1193–5.
Forbes D, Forbes SC, Blake CM, Thiessen EJ, Forbes S. Exercise programs for people with dementia. Cochrane Db Syst Rev. 2015;4:CD006489.
Li C, Friedman B, Conwell Y, Fiscella K. Validity of the Patient Health Questionnaire 2 (PHQ-2) in identifying major depression in older people. J Am Geriatr Soc. 2007;55:596–602.
Panel B the 2019 AGSBCUE. American Geriatrics Society 2019 Updated AGS Beers Criteria® for potentially inappropriate medication use in older adults. J Am Geriatr Soc. 2019;67:674–694.
Baumgart M, Snyder HM, Carrillo MC, Fazio S, Kim H, Johns H. Summary of the evidence on modifiable risk factors for cognitive decline and dementia: A population-based perspective. Alzheimer’s Dementia. 2015;11:718–26.
K S MH, R W CJ, T T EC. Speech-language pathologist interventions for communication in moderate–severe dementia: a systematic review. Am J Speech Lang Pathol. 2018;27:836–52.
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This paper represents independent research in part supported by the National Institute of Health (NIH) grant number P30AG062429.
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Bevins, E.A., Peters, J. & Léger, G.C. The Diagnosis and Management of Reversible Dementia Syndromes. Curr Treat Options Neurol 23, 3 (2021). https://doi.org/10.1007/s11940-020-00657-x
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DOI: https://doi.org/10.1007/s11940-020-00657-x