{"id":51933,"date":"2022-07-01T14:10:03","date_gmt":"2022-07-01T17:10:03","guid":{"rendered":"http:\/\/condorinst.com.br\/?p=51933"},"modified":"2026-08-24T12:11:49","modified_gmt":"2026-08-24T15:11:49","slug":"alzheimer-e-sono","status":"publish","type":"post","link":"https:\/\/condor.fabbricaweb.com.br\/pt\/alzheimer-e-sono\/","title":{"rendered":"Alzheimer e sono"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A doen\u00e7a de Alzheimer \u00e9 uma doen\u00e7a neurodegenerativa que foi documentada pela primeira vez em 1906 por Alois Alzheimer (<a href=\"\/\/_ENREF_12\" target=\"_blank\" rel=\"noreferrer noopener\">SORIA LOPEZ; GONZ\u00c1LEZ; L\u00c9GER, 2019<\/a>). A degenera\u00e7\u00e3o ocorre principalmente em \u00e1reas respons\u00e1veis pela linguagem, mem\u00f3ria, processamento visual e fun\u00e7\u00f5es executivas (<a href=\"\/\/_ENREF_6\" target=\"_blank\" rel=\"noreferrer noopener\">KNOPMAN; AMIEVA; PETERSEN; CH\u00c9TELAT<em> et al.<\/em>, 2021<\/a>). O diagn\u00f3stico \u00e9 dificultado pelos in\u00edcios tardios dos sintomas observ\u00e1veis, que ocorrem entre 10 a 20 anos ap\u00f3s o in\u00edcio da degenera\u00e7\u00e3o (<a href=\"\/\/_ENREF_13\" target=\"_blank\" rel=\"noreferrer noopener\">SPERLING; AISEN; BECKETT; BENNETT<em> et al.<\/em>, 2011<\/a>) e o maior fator de risco para o desenvolvimento da doen\u00e7a \u00e9 a idade. Ainda h\u00e1 controv\u00e9rsias em rela\u00e7\u00e3o \u00e0s causas da doen\u00e7a, no entanto, a hip\u00f3tese mais prevalente \u00e9 de que a doen\u00e7a ocorre a partir do ac\u00famulo de prote\u00edna beta amiloide no c\u00e9rebro (<a href=\"\/\/_ENREF_11\" target=\"_blank\" rel=\"noreferrer noopener\">SELKOE, 2004<\/a>). Embora a doen\u00e7a de Alzheimer seja a maior causa de dem\u00eancia, esta condi\u00e7\u00e3o pode ser desencadeada por outras patologias neurodegenerativas, especialmente em idosos (<a href=\"\/\/_ENREF_5\" target=\"_blank\" rel=\"noreferrer noopener\">KAPASI; DECARLI; SCHNEIDER, 2017<\/a>). Ademais, a preval\u00eancia de dem\u00eancia \u00e9 elevada e tende a se elevar mais, partindo de 50 milh\u00f5es de pessoas em 2010 e chegando a 113 milh\u00f5es de pessoas ao redor do mundo no ano 2050 (<a href=\"\/\/_ENREF_2\" target=\"_blank\" rel=\"noreferrer noopener\">BRODATY; BRETELER; DEKOSKY; DORENLOT<em> et al.<\/em>, 2011<\/a>). Portanto, considerando a caracter\u00edstica debilitante da doen\u00e7a e sua alta preval\u00eancia, o objetivo deste artigo \u00e9 elucidar as rela\u00e7\u00f5es entre a doen\u00e7a de Alzheimer e o ciclo vig\u00edlia-sono.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dist\u00farbios de sono e de ritmo vig\u00edlia-sono s\u00e3o comuns em pacientes com doen\u00e7a de Alzheimer. Estes pacientes apresentam desequil\u00edbrios em rela\u00e7\u00e3o ao hor\u00e1rio de in\u00edcio e dura\u00e7\u00e3o do sono, que se manifesta atrav\u00e9s de maior lat\u00eancia para in\u00edcio de sono e tempo acordado durante a noite, bem como epis\u00f3dios de sono durante a fase clara do dia que, com o passar do tempo, pode gerar invers\u00e3o da fase de sono destes pacientes. Analisando a arquitetura do sono, \u00e9 poss\u00edvel observar que estes pacientes apresentam redu\u00e7\u00e3o na propor\u00e7\u00e3o de sono REM em compara\u00e7\u00e3o a indiv\u00edduos controle da mesma idade, levando \u00e0 restri\u00e7\u00e3o cr\u00f4nica de sono REM (<a href=\"\/\/_ENREF_9\" target=\"_blank\" rel=\"noreferrer noopener\">PETIT; GAGNON; FANTINI; FERINI-STRAMBI<em> et al.<\/em>, 2004<\/a>). N\u00e3o somente, estes pacientes tamb\u00e9m apresentam redu\u00e7\u00e3o da propor\u00e7\u00e3o de sono de ondas lentas (<a href=\"\/\/_ENREF_7\" target=\"_blank\" rel=\"noreferrer noopener\">MARTIN; LOEWENSTEIN; KAYE; EBERT<em> et al.<\/em>, 1986<\/a>).&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Estas altera\u00e7\u00f5es na organiza\u00e7\u00e3o temporal e na estrutura do sono acontecem cedo no percurso da doen\u00e7a. H\u00e1 estudos em ratos demonstrando que a deposi\u00e7\u00e3o de prote\u00edna beta amiloide acarreta altera\u00e7\u00f5es na arquitetura do sono, atraso da fase de sono, n\u00edvel de atividade noturna alterado e redu\u00e7\u00e3o do sono REM. Estes efeitos eram, em alguns casos, revertidos ap\u00f3s imunoterapia com beta amiloides, demonstrando o papel que esta prote\u00edna exerce nos pacientes (<a href=\"\/\/_ENREF_10\" target=\"_blank\" rel=\"noreferrer noopener\">ROH; HUANG; BERO; KASTEN<em> et al.<\/em>, 2012<\/a>).&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2022\/07\/Alzhaimer.png\" alt=\"\" class=\"wp-image-51935\" width=\"399\" height=\"399\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2022\/07\/Alzhaimer.png 1024w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2022\/07\/Alzhaimer-300x300.png 300w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2022\/07\/Alzhaimer-768x768.png 768w\" sizes=\"(max-width: 399px) 100vw, 399px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tais dist\u00farbios s\u00e3o agravados pela idade, especialmente se estes indiv\u00edduos possu\u00edrem outras condi\u00e7\u00f5es cl\u00ednicas. Isto os leva a reduzir os n\u00edveis de atividade f\u00edsica, hor\u00e1rios de refei\u00e7\u00f5es irregulares e, consequentemente, gerando poucos est\u00edmulos para sincroniza\u00e7\u00e3o do ritmo vig\u00edlia-sono. Refor\u00e7ando este componente, pacientes institucionalizados frequentemente possuem baixa exposi\u00e7\u00e3o \u00e0 luz e, por fim, medica\u00e7\u00f5es para depress\u00e3o, hipertens\u00e3o e doen\u00e7as card\u00edacas podem levar a dist\u00farbios do ritmo vig\u00edlia-sono (<a href=\"\/\/_ENREF_4\" target=\"_blank\" rel=\"noreferrer noopener\">JU; LUCEY; HOLTZMAN, 2014<\/a>). Estes fatores amplificam os sinais que contribuem negativamente para a qualidade de sono e estabilidade do ritmo vig\u00edlia-sono.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por outro lado, h\u00e1 estudos demonstrando que a restri\u00e7\u00e3o de sono e\/ou sono de m\u00e1 qualidade s\u00e3o fatores predisponentes para o desenvolvimento de desordens cognitivas (<a href=\"\/\/_ENREF_3\" target=\"_blank\" rel=\"noreferrer noopener\">FAUBEL; L\u00d3PEZ-GARC\u00cdA; GUALLAR-CASTILL\u00d3N; GRACIANI<em> et al.<\/em>, 2009<\/a>). Um estudo prospectivo avaliou o sono de volunt\u00e1rios utilizando actigrafia e os resultados demonstraram que a fragmenta\u00e7\u00e3o de sono aumentou o risco para desenvolvimento da doen\u00e7a de Alzheimer (<a href=\"\/\/_ENREF_14\" target=\"_blank\" rel=\"noreferrer noopener\">STERNICZUK; THEOU; RUSAK; ROCKWOOD, 2013<\/a>). Tanto em ratos quanto em humanos, os n\u00edveis de beta amiloide sol\u00favel flutuam ao longo da vig\u00edlia-sono, de forma que os n\u00edveis aumentam durante a vig\u00edlia e decrescem durante o sono. Assim, a priva\u00e7\u00e3o de sono aguda aumenta a concentra\u00e7\u00e3o de beta amiloide e, al\u00e9m disso, a restri\u00e7\u00e3o de sono cr\u00f4nica acelera a deposi\u00e7\u00e3o de beta amiloides em placas insol\u00faveis (<a href=\"\/\/_ENREF_1\" target=\"_blank\" rel=\"noreferrer noopener\">ANCOLI-ISRAEL; COLE; ALESSI; CHAMBERS<em> et al.<\/em>, 2003<\/a>).&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>Conclus\u00e3o<\/em>&nbsp;<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A doen\u00e7a de Alzheimer \u00e9 uma condi\u00e7\u00e3o extremante debilitante para o indiv\u00edduo e, em rela\u00e7\u00e3o ao sono, as evid\u00eancias indicam que ins\u00f4nia noturna, agita\u00e7\u00e3o durante a noite e sonol\u00eancia excessiva diurna afetam de 25 a 40% dos pacientes com doen\u00e7a de Alzheimer, de forma que a intensidade destes dist\u00farbios se correlaciona com a intensidade da doen\u00e7a. Como j\u00e1 mencionado, os ritmos circadianos apresentam redu\u00e7\u00e3o na amplitude dos ritmos end\u00f3genos e atraso de fase destes ritmos, especialmente em est\u00e1gios avan\u00e7ados da doen\u00e7a. Dist\u00farbios de sono acontecem cedo no percurso da doen\u00e7a, fato que contribui para o avan\u00e7o da patologia. Assim, \u00e9 importante que estes pacientes sejam monitorados e recebam cuidados espec\u00edficos, especialmente em rela\u00e7\u00e3o \u00e0 avalia\u00e7\u00e3o dos ritmos biol\u00f3gicos e dist\u00farbios de sono.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>Como avaliar o sono destes pacientes<\/em>&nbsp;<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A polissonografia \u00e9 considerada o padr\u00e3o ouro para avalia\u00e7\u00e3o do sono, por\u00e9m, a utiliza\u00e7\u00e3o deste m\u00e9todo em pacientes com doen\u00e7a de Alzheimer geralmente \u00e9 dif\u00edcil pois exige coopera\u00e7\u00e3o do paciente e, em muitos casos, especialmente em est\u00e1gios avan\u00e7ados da doen\u00e7a, os pacientes n\u00e3o conseguem tolerar procedimentos de laborat\u00f3rio. De maneira similar, a aplica\u00e7\u00e3o de question\u00e1rios, como por exemplo o \u00cdndice de Qualidade de Sono de Pittsburgh (<em>Pittsburgh Sleep Quality Index \u2013 PSQI) <\/em>apresentam pouco valor pr\u00e1tico, visto que estes pacientes tendem a subestimar os dist\u00farbios de sono e de ritmos j\u00e1 existentes, mesmo em est\u00e1gios iniciais da doen\u00e7a (<a href=\"\/\/_ENREF_8\" target=\"_blank\" rel=\"noreferrer noopener\">MOST; ABOUDAN; SCHELTENS; VAN SOMEREN, 2012<\/a>), levando a resultados enviesados.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Assim, a actigrafia se torna um procedimento mais adequado para avaliar o sono e ritmo vig\u00edlia-sono nestes pacientes, visto que \u00e9 uma t\u00e9cnica menos invasiva. A actigrafia \u00e9 uma t\u00e9cnica que pode ser utilizada para avaliar o padr\u00e3o de sono e do ritmo vig\u00edlia-sono. O act\u00edgrafo \u00e9 um dispositivo semelhante a um rel\u00f3gio de punho que cont\u00e9m sensores de luz, movimento e temperatura. Assim, atrav\u00e9s destas informa\u00e7\u00f5es, \u00e9 poss\u00edvel extrair dados a respeito de vari\u00e1veis como tempo total de sono, lat\u00eancia para in\u00edcio do sono, tempo acordado ap\u00f3s in\u00edcio do sono, efici\u00eancia de sono, tempo em vig\u00edlia e vari\u00e1veis relacionadas ao ritmo, como cosinor, espectograma, periodograma, e vari\u00e1veis n\u00e3o param\u00e9tricas como L5, M10, IS e IV.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/condor.fabbricaweb.com.br\/pt\/contato\/\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"1024\" height=\"427\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1.png\" alt=\"\" class=\"wp-image-34124\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1.png 1024w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1-300x125.png 300w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/CONDOR-FOOTER-1-1024x427-1-768x320.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/condor.fabbricaweb.com.br\/pt\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/condor.fabbricaweb.com.br\/<\/a><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/condor.fabbricaweb.com.br\/pt\/contato\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fale Conosco<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Alzheimer&#8217;s disease is a neurodegenerative disease that was first documented in 1906 by Alois Alzheimer.SORIA LOPEZ; GONZALEZ; LEGER, 2019Degeneration occurs mainly in areas responsible for language, memory, visual processing, and executive functions.KNOPMAN; AMIEVA; PETERSEN; CH\u00c9TELAT et al., 2021Diagnosis is complicated by the late onset of observable symptoms, which occur between 10 to 20 years after [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":51934,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[11,12],"tags":[],"class_list":["post-51933","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actigraphy","category-sleep-and-health"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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