{"id":18,"date":"2021-02-26T15:28:26","date_gmt":"2021-02-26T18:28:26","guid":{"rendered":"https:\/\/condor.fabbricaweb.com.br\/blog\/?p=18"},"modified":"2026-08-24T12:11:18","modified_gmt":"2026-08-24T15:11:18","slug":"o-que-actigrafia","status":"publish","type":"post","link":"https:\/\/condor.fabbricaweb.com.br\/pt\/o-que-actigrafia\/","title":{"rendered":"O QUE \u00c9 ACTIGRAFIA?"},"content":{"rendered":"<figure class=\"wp-block-image alignright size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1.png\" alt=\"act\u00edgrafo\" class=\"wp-image-34156\" width=\"305\" height=\"381\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1.png 819w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1-240x300.png 240w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-POST-NOVO-819x1024-1-768x960.png 768w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Actigrafia \u00e9 o m\u00e9todo de acompanhamento de ciclos de atividade e de repouso. Por meio dela acontece constantemente a capta\u00e7\u00e3o, de forma n\u00e3o invasiva, compila\u00e7\u00e3o e processamento de informa\u00e7\u00f5es para an\u00e1lise do ritmo de sono\/vig\u00edlia em per\u00edodos longos identificando fases de atividade e descanso.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Saiba como ela pode ser aplicada \u00e0 diversas \u00e1reas da medicina<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ao entender como a actigrafia funciona, \u00e9 poss\u00edvel encontrar e aplicar o m\u00e9todo em diversas \u00e1reas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De maneira pr\u00e1tica e direta, \u00e9 assim que definimos a actigrafia. No entanto, julgamos ser importante o aprofundamento sobre o assunto e vamos faz\u00ea-lo ao longo deste artigo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Detalhando as defini\u00e7\u00f5es, conhecendo novas tecnologias e apresentando respostas para perguntas como:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Como a actigrafia funciona?<\/li>\n\n\n\n<li>Quais as vantagens da actigrafia?<\/li>\n\n\n\n<li>Existem outras aplica\u00e7\u00f5es da actigrafia al\u00e9m da medicina do sono?<\/li>\n\n\n\n<li>Como funcionam os act\u00edgrafos hoje?<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">O ciclo de dia e noite<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9 comum, \u00e0 maioria dos seres vivos, a intera\u00e7\u00e3o cont\u00ednua com um per\u00edodo de constante mudan\u00e7a ambiental: o <strong>ciclo de dia e noite<\/strong>, decorrente da rota\u00e7\u00e3o da terra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Essa rela\u00e7\u00e3o exerceu forte influ\u00eancia no processo evolutivo de modo que uma s\u00e9rie de oscila\u00e7\u00f5es fisiol\u00f3gicas e comportamentais s\u00e3o expressas de forma sincronizadas ao passo que a intera\u00e7\u00e3o com tais per\u00edodos aconteciam e ainda acontecem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As consequ\u00eancias da intera\u00e7\u00e3o de ciclos de dia e noite tamb\u00e9m s\u00e3o observadas nos seres humanos, onde <strong>eventos fisiol\u00f3gicos como a queda ou eleva\u00e7\u00e3o da frequ\u00eancia respirat\u00f3ria, libera\u00e7\u00e3o hormonal, termorregula\u00e7\u00e3o e outros<\/strong> apresentam oscila\u00e7\u00e3o em per\u00edodos de aproximadamente 24 horas e podem ser analisadas longitudinalmente, de modo que seja poss\u00edvel obter um panorama bastante completo sobre o que acontece em nosso corpo ao longo de um dia.<br>E \u00e9 para o pleno entendimento deste panorama que a actigrafia se mostra t\u00e3o importante<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Como a actigrafia funciona?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A actigrafia \u00e9 realizada atrav\u00e9s de um <a href=\"https:\/\/condor.fabbricaweb.com.br\/pt\/acttrust\/\">act\u00edmetro<\/a><\/strong>, um aparelho que normalmente se parece muito com um rel\u00f3gio e comumente utilizado no bra\u00e7o n\u00e3o dominante do indiv\u00edduo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O equipamento registra a movimenta\u00e7\u00e3o por meio de pelo menos um aceler\u00f4metro, utilizado para captar movimento, Essa medi\u00e7\u00e3o ocorre, normalmente, minuto a minuto. Act\u00edgrafos modernos possuem outros sensores, como os de temperatura e luminosidade entre outros, que podem contribuir para as an\u00e1lises de sono e do <strong>ritmo circadiano<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O trabalho do act\u00edgrafo \u00e9, essencialmente, a capta\u00e7\u00e3o de informa\u00e7\u00f5es e, a partir dos dados provenientes do uso do aparelho, \u00e9 poss\u00edvel:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Detectar a exist\u00eancia de dist\u00farbios de sono e ritmicidade circadiana, avaliando a qualidade do sono, estimar tempo na cama, detectar epis\u00f3dios de sono durante o dia, assim como estimar n\u00edveis de atividade f\u00edsica e estabilidade do ritmo circadiano na rotina dos indiv\u00edduos.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Monitorar os movimentos a partir da actigrafia para o uso em estudos na \u00e1rea de medicina de sono, psiquiatria, medicina do trabalho, psicologia comportamental, entre outras \u00e1reas de conhecimento em que a an\u00e1lise da express\u00e3o da ritmicidade circadiana tenha um papel fundamental para uma observa\u00e7\u00e3o mais aprofundada dos dist\u00farbios.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ao longo dos anos e de diversas inova\u00e7\u00f5es tecnol\u00f3gicas e cient\u00edficas, os act\u00edgrafos de hoje podem fornecer informa\u00e7\u00f5es sobre par\u00e2metros da express\u00e3o da ritmicidade circadiana e sono com dados gerados atrav\u00e9s de an\u00e1lises detalhadas por par\u00e2metros pr\u00e9-estabelecidos:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2713 Exposi\u00e7\u00e3o \u00e0 luz durante o dia;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2713 Express\u00e3o da ritmicidade da temperatura corporal;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2713 Eventos durante a fase do sono;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Deste modo, a actigrafia assume um papel importante no levantamento de informa\u00e7\u00f5es que auxiliam a elabora\u00e7\u00e3o de diagn\u00f3sticos mais robustos e assertivos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O ritmo circadiano<\/h2>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02.png\" alt=\"\" class=\"wp-image-34150\" width=\"507\" height=\"422\" srcset=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02.png 720w, https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/02\/CONDOR-BLOG-02-300x250.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><figcaption class=\"wp-element-caption\"><em>*O gr\u00e1fico acima representa o ciclo de um indiv\u00edduo, existem varia\u00e7\u00f5es de caso a caso por diversos fatores.<br>Refer\u00eancias: https:\/\/images.app.goo.gl\/aXL3RWJeGrtmf6ji6<br>https:\/\/images.app.goo.gl\/vKbkSXNB7Hw4G2Ey5<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Entende-se como ritmo circadiano (ou ciclos circadianos),o ciclos biol\u00f3gicos que tem a dura\u00e7\u00e3o aproximada de 24 horas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A intera\u00e7\u00e3o das informa\u00e7\u00f5es ambientais naturais (ciclo claro\/escuro) com o sistema oscilador circadiano do indiv\u00edduo tem um papel essencial na regula\u00e7\u00e3o de diversos eventos fisiol\u00f3gicos e comportamentais do organismo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Entre os mais comumente analisados est\u00e3o:<br>&#8211; Digest\u00e3o;<br>\u2013 Renova\u00e7\u00e3o das c\u00e9lulas;<br>\u2013 S\u00edntese proteica;<br>\u2013 Atividade anti-inflamat\u00f3ria;<br>\u2013 Controle da temperatura;<br>\u2013 Estados de vig\u00edlia e de sono.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">   <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong> neste \u00faltimo que a maioria das pessoas t\u00eam conhecimento de que a express\u00e3o do ritmo se d\u00e1 por volta de uma dura\u00e7\u00e3o de 24 horas.<\/strong><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A partir do acompanhamento de oscila\u00e7\u00f5es fisiol\u00f3gicas e comportamentais ao longo do dia, \u00e9 poss\u00edvel propor uma organiza\u00e7\u00e3o temporal entre diversos par\u00e2metros, inclusive a intera\u00e7\u00e3o com eventos ambientais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O gr\u00e1fico que abre essa se\u00e7\u00e3o em nosso artigo \u00e9 um exemplo de como pode ser a organiza\u00e7\u00e3o<br>temporal interna de diversos ritmos com express\u00e3o circadiana. \u00c9 poss\u00edvel identificar em que hora do dia, determinados estados fisiol\u00f3gicos se destacam e, atrav\u00e9s da an\u00e1lise destes estados, indicar poss\u00edveis disfun\u00e7\u00f5es que podem apontar problemas de sa\u00fade, de ordem f\u00edsica e\/ou psicol\u00f3gica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A vantagem da actigrafia sobre outros m\u00e9todos<\/h2>\n\n\n\n<figure class=\"wp-block-image alignleft size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/condor.fabbricaweb.com.br\/wp-content\/uploads\/2021\/08\/Imagem_01-1-768x588-1.jpg\" alt=\"\" class=\"wp-image-34194\" width=\"445\" height=\"339\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Muitos desses eventos, que t\u00eam como caracter\u00edstica a identifica\u00e7\u00e3o da express\u00e3o circadiana, s\u00f3 tem o acompanhamento poss\u00edvel utilizando protocolos de testes comportamentais espec\u00edficos, de forma invasiva e dentro de um ambiente laboratorial.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A grande vantagem da actimetria \u00e9 a de fornecer informa\u00e7\u00e3o dos h\u00e1bitos das pessoas no seu ambiente natural por um longo per\u00edodo de tempo de maneira n\u00e3o invasiva. Atrav\u00e9s do act\u00edgrafo, \u00e9 poss\u00edvel extrair dados que sustentam ou n\u00e3o as hip\u00f3teses previamente levantadas, al\u00e9m de outras informa\u00e7\u00f5es que comp\u00f5em um diagn\u00f3stico mais completo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplica\u00e7\u00e3o cl\u00ednica da actigrafia<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conhecida por sua aplica\u00e7\u00e3o no campo da medicina do sono e cronobiologia, o uso da actigrafia pode ser aplicado em outras \u00e1reas de pesquisa, desenvolvimento e medicina, fornecendo dados para diagn\u00f3sticos e tratamentos cl\u00ednicos em outros campos, como mostram uma s\u00e9rie de artigos cient\u00edficos publicados em diversos pa\u00edses encontrados na base de dados Pubmed. A seguir, relacionamos algumas \u00e1reas da medicina que t\u00eam feito uso da actigrafia:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Cardiologia<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um artigo da New York Heart Classification descreve o uso do act\u00edgrafo em 35 idosos com insufici\u00eancia card\u00edaca do Tipo I ao III. Os pacientes usaram o aparelho no punho n\u00e3o dominante por 9 meses e atrav\u00e9s das informa\u00e7\u00f5es coletadas, foi poss\u00edvel constatar falta de disposi\u00e7\u00e3o com menos movimentos e mais altera\u00e7\u00f5es circadianas. Adicionalmente, os autores mencionam que a falta de disposi\u00e7\u00e3o di\u00e1ria \u00e9 um preditor para um maior n\u00famero de interna\u00e7\u00f5es hospitalares.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Cronobiologia<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Several studies in the field of chronobiology use actimeters to observe the expression of circadian rhythmicity. It is possibly one of the areas in which actigraphy is used most routinely. Through actigraphy, it is possible to detect alterations in the expression of circadian rhythmicity in treatments, monitor the rhythm of activity and rest of shift workers, identify rhythm disturbances, as well as studies that identify seasonal oscillations in behavior. In a recent study, entitled &#8220;Sleep misalignment and circadian rhythm impairment in long-haul bus drivers under a two-up operations system&#8221; The study, which evaluated bus drivers with actigraphy, found that the operation with the highest risk work routine negatively affects the expression of circadian rhythmicity associated with sleep fragmentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Dist\u00farbios do Sono<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study &#8220;Behavioral correlates of sleep-disordered breathing in older men&#8221;, using data obtained through actigraphy and polysomnography, followed 2849 men over the age of 65 with untreated sleep apnea. It was observed that total sleep time assessed by actimeters was associated with daytime sleepiness, poor sleep quality and sleep disturbances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In another study, entitled &#8220;Comparison of sleep quality assessed by actigraphy and questionnaires to healthy subjects&#8221;, the authors identified an association between parameters usually used to analyze circadian rhythmicity and self-reported sleep quality in healthy individuals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Quadros de Dor Cr\u00f4nica<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No estudo piloto \u201cObjective and subjective assessment of sleep in chronic low back pain patients<br>compared with healthy age and gender matched controls&#8221; (Objective and subjective evaluation of sleep in patients with chronic low back pain compared with healthy age and gender matched controls), quantitatively and qualitatively evaluated the sleep of people with chronic low back pain, where 15<br>destas possu\u00edam sintomas e as outras 15 eram grupo de controle.<br>Os dados objetivos (quantitativos) foram obtidos por meio de actigrafia e os subjetivos (qualitativos) por meio de question\u00e1rio. Foi observado que nos indiv\u00edduos que dor lombar cr\u00f4nica apresentam um sono de pior qualidade, associados com o aumento da sonol\u00eancia diurna.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Medicina da Mulher<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O estudo \u201cEffect of external motion on correspondence between infant actigraphy and maternal<br>diary\u201d (Efeito do movimento externo na correspond\u00eancia entre actigrafia infantil e o dia a dia materno), realizado com 112 mulheres, tinha como finalidade medir de forma objetiva o impacto da fragmenta\u00e7\u00e3o do sono e sua influ\u00eancia na depress\u00e3o p\u00f3s-parto. Atrav\u00e9s do uso da actigrafia, foi poss\u00edvel constatar que dormir ao menos uma hora durante o dia indicava correla\u00e7\u00e3o com \u00edndices menores de depress\u00e3o p\u00f3s-parto.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Neurologia<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The actigraph was used in patients who found it difficult to perform full-night polysomnography, such as people with dementia. Actigraphy was also used to collect data for the report &#8220;Melatonin fails to improve sleep or agitation in doubleblind randomized placebo-controlled trial of institutionalized patients with Alzheimer&#8217;s disease&#8221;, to improve the expression of circadian rhythmicity in patients with a probable diagnosis of Alzheimer&#8217;s disease and to analyse the effects of melatonin on their sleep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No entanto, a partir da an\u00e1lise da actigrafia, foi poss\u00edvel observar que n\u00e3o houve diferen\u00e7as em par\u00e2metros de sono e ritmo, o que talvez poderia ser afetado pela utiliza\u00e7\u00e3o de question\u00e1rios.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2013 Actigrafia e Psiquiatria<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study &#8220;Anxiety symptoms and objectively measured sleep quality in older women&#8221;, carried out with 3040 older women (86 years on average), aimed to establish a correlation between sleep patterns and anxiety.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na metodologia, o act\u00edgrafo foi utilizado para coletar dados sobre o tempo total de sono, efici\u00eancia do sono, lat\u00eancia e outros par\u00e2metros. Foi observado um sono de baixa qualidade e uma maior fragmenta\u00e7\u00e3o do sono em mulheres mais velhas n\u00e3o sendo associado com outros tipos de dist\u00farbios comportamentais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the article &#8220;Activity\/rest rhythm of depressed adolescents undergoing therapy: case studies&#8221;, adolescents with depressive disorders were followed up by actigraphy recording for 13 consecutive weeks. A relationship was observed between high scores on the CDRS-R (a questionnaire that assesses depressive symptoms) and a stable decrease in the expression of activity and rest rhythms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Finalizando<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Combinado com outros m\u00e9todos, exames e equipamentos, ou atrav\u00e9s do seu uso exclusivo, \u00e9 claro que a actigrafia t\u00eam se provado de grande valia no avan\u00e7o da obten\u00e7\u00e3o de dados, diagn\u00f3sticos e valida\u00e7\u00e3o de hip\u00f3teses em diversos campos da medicina e ci\u00eancias da sa\u00fade, tanto no campo cl\u00ednico quanto cient\u00edfico, de forma a nortear profissionais de diferentes \u00e1reas a rescrever tratamentos mais assertivos e eficientes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/condor.fabbricaweb.com.br\/pt\/contato\/\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" 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><\/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>Actigraphy is a method of monitoring activity and rest cycles. It constantly captures, non-invasively, compiles and processes information to analyze the sleep\/wake rhythm over long periods, identifying phases of activity and rest. Find out how it can be applied to different areas of medicine By understanding how actigraphy works, it is possible to find and [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":34156,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[11],"tags":[],"class_list":["post-18","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actigraphy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is actigraphy? - Condor Instruments<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is actigraphy? - Condor Instruments\" \/>\n<meta property=\"og:description\" content=\"Actigraphy is a method of monitoring activity and rest cycles. It constantly captures, non-invasively, compiles and processes information to analyze the sleep\/wake rhythm over long periods, identifying phases of activity and rest. 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