Prática de Shadowing: Narcolepsy Visually Explained - Aprenda a falar inglês com vídeo
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Narcolepsy is a chronic sleep -wake disorder which classically causes the tetrad of excessive daytime sleepiness,
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cataplexy which describes sudden muscle weakness that can lead to collapse, dream -like hallucinations, and sleep paralysis.
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Disease onset is usually in a person's 20s, although it can be diagnosed at any age.
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Importantly, narcolepsy isn't actually that rare, being the second commonest cause of disabling daytime sleepiness after obstructive sleep apnea.
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Its estimated prevalence is about 1 in 1000.
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Most of the cases of narcolepsy are sporadic.
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However, there are familial clusterings suggesting either a genetic or environmental link.
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The disease can be classified into type 1 and type 2 narcolepsy.
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Type 1 is caused by extensive neuron loss in the hypothalamus.
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These specific neurons produce orexin, also referred to as hypocretin,
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which is a neuropeptide that stabilises the sleep and wake stages and prevents inappropriate transitions between them.
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As a result, this type is associated with very low levels of orexin and severe symptoms including cataplexy.
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Type 2 has normal orexin levels, including most of the same symptoms, but doesn't have cataplexy.
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The process that destroys the orexin -producing neurons remains a bit of a mystery,
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but more than 98 % of people with type 1 narcolepsy have the HLA -DQB1 gene.
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This suggests there might be an autoimmune element to it.
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Let's discuss the main clinical features.
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All patients with narcolepsy have excessive daytime sleepiness.
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This can be associated with memory problems and attention issues, resulting in incidents like car crashes.
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The Epworth Sleepiness Scale can be used for evaluating excessive daytime sleepiness.
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People with narcolepsy are also prone to sleep attacks.
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These occur in inappropriate situations several times a day, even when fully involved in a task, and last between one minute and one hour.
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In addition to sleepiness, narcolepsy also characterised by disordered regulation of rapid eye movement sleep.
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REM sleep normally occurs only during the usual sleep period, and includes vivid story -like dreams,
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rapid eye movements, and paralysis of nearly all skeletal muscles except the muscles of respiration.
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In narcolepsy, REM sleep can actually occur at any time of the day, intruding into wakefulness.
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The most severe manifestation of this is cataplexy, which occurs in 60 % of patients.
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This is a generalized muscle weakness, leading to partial or complete collapse.
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It is most frequently triggered by emotional stimuli such as laughter, excitement, or anger.
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Speech may be impaired, vision might be blurred, and respiration might become irregular during the attack.
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Many people with narcolepsy also complain of sleep paralysis, which occurs at the borders of sleep, typically when waking up.
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This is often associated with dreamlike and often disturbing hallucinations.
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Hallucinations that occur at the onset of sleep are referred to as hypnagogic hallucinations,
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and those that occur on awakening are referred to as hypnopompic hallucinations.
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Typical hallucinations might include the sense that a threatening stranger is in the bedroom, or that one's being attacked by animals.
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Moving to investigations, the clinical history of narcolepsy often makes the diagnosis apparent,
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but it's essential to confirm it with overnight polysonography, followed by multiple sleep latency tests the next day.
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The PSG ascertains sleep quality and can identify coexisting causes of excessive daytime sleepiness such as OSA.
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In people with narcolepsy, it might show fragmented light sleep and an early transition into REM sleep.
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The MSLT is performed the day after.
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In this test, the patient is encouraged throughout the day to fall asleep every 2 hours for 20 minutes.
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Given the opportunity to nap, nap, people with narcolepsy usually fall asleep in less than 8 minutes,
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whereas healthy people generally fall asleep in more than 15 minutes.
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In addition, people with narcolepsy will have REM sleep during at least two of these daytime naps.
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The management of narcolepsy is based on lifestyle modifications and medications to treat excessive daytime sleepiness and cataplexy.
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Non -pharmacological approaches should include improving sleep hygiene by adopting a relatively strict sleep schedule and avoiding alcohol,
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smoking, late late night exercise and sleep deprivation.
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Excessive daytime sleepiness can be managed with CNS stimulants.
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One first -line medication is modafinil.
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Other medications, including dexamphetamine and methylphenidate like Ritalin,
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have evidence, but a lack of head -to -head trials makes it difficult to compare efficacy between drugs.
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Cataplexy is usually managed with sodium oxabate or bitosaline.
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These reduce the frequency of attacks per week second -line agents such as serotonin noradrenaline reuptake inhibitors
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or tricyclic antidepressants can also be considered.
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To remember the classic triad of clinical symptoms for narcolepsy, remember CHESS features, including cataplexy,
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hallucinations, excessive somnolence, and sleep paralysis.
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If you like this mnemonic, then check out some of my other videos in this playlist.
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Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível C1 usa o vídeo “Narcolepsy Visually Explained”. As palavras que mais se repetem: sleep, narcolepsy, sleepiness, daytime, cataplexy. Este vídeo tem 57 frases e 767 palavras para praticar shadowing. A fala dura 5:51. O falante mantém um ritmo estável de cerca de 131 palavras por minuto, confortável para o shadowing. Apenas 68% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
As 15 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| narcolepsy substantivo | /ˈnɑː(ɹ)kəˌlɛpsi/ | narcolepsia |
| sleepiness substantivo | sonolência | |
| daytime substantivo | /ˈdeɪtaɪm/ | dia |
| hallucination substantivo | /həˌluːsɪˈneɪʃən/ | alucinação |
| paralysis substantivo | /pəˈɹæləsəs/ | paralisia |
| neuron substantivo | /ˈn(j)ʊɹɑn/ | neurônio, neurónio |
| symptom substantivo | /ˈsɪm(p)təm/ | sintoma |
| respiration substantivo | /ɹɛspɪˈɹeɪʃən/ | respiração |
| onset substantivo | /ˈɒnˌsɛt/ | anábase |
| inappropriate adjetivo | /ˌɪnəˈpɹoʊpɹi.ət/ | inapropriado, improcedente |
| antidepressant substantivo | antidepressivo | |
| ascertain verbo | /ˌæsəˈteɪn/ | averiguar, determinar |
| autoimmune adjetivo | /ˌɔːtəʊɪˈmjuːn/ | autoimune |
| awaken verbo | /əˈweɪkən/ | acordar, despertar |
| classify verbo | /ˈklæs.əˌfaɪ/ | classificar |
Phrasal verbs que você vai ouvir
| Palavra | Pronúncia | Significado |
|---|---|---|
| check out verbo | verificar, sacar só | |
| wake up verbo | /ˌweɪk ˈʌp/ | acordar, despertar |
Pronúncia para ficar de olho
- Os sons de “th”: methylphenidate /ˌmɛθ əlˈfɛn ɪˌdeɪt/, threaten /ˈθɹɛt.n̩/
- Os sons de “sh” e “zh”: hallucination /həˌluːsɪˈneɪʃən/, respiration /ɹɛspɪˈɹeɪʃən/, deprivation /ˌdɛp.ɹɪˈveɪʃən/, manifestation /ˌmænɪfɛˈsteɪʃən/, modification /ˌmɑdɪfɪˈkeɪʃən/
- Palavras longas — acerte a sílaba tônica: narcolepsy /ˈnɑː(ɹ)kəˌlɛpsi/, cataplexy /ˈkætəˌplɛksi/, hallucination /həˌluːsɪˈneɪʃən/, paralysis /pəˈɹæləsəs/, respiration /ɹɛspɪˈɹeɪʃən/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: onset /ˈɒnˌsɛt/, inappropriate /ˌɪnəˈpɹoʊpɹi.ət/, coexist /ˌkoʊ.ɪɡˈzɪst/, dreamlike /ˈdɹimlaɪk/, hypnagogic /ˌhɪpnəˈɡɑd͡ʒɪk/
- /l/ final — a língua toca o céu da boca, não vira “u”: familial /fəˈmɪljəl/, pharmacological /ˌfɑɹməkəˈlɒd͡ʒɪkəl/, skeletal /ˈskɛl.ə.təl/, disable /dɪsˈeɪbəl/
- /h/ — um sopro suave, diferente do “r”: hallucination /həˌluːsɪˈneɪʃən/, hypnagogic /ˌhɪpnəˈɡɑd͡ʒɪk/, hypocretin /ˌhaɪ.poʊˈkɹiː.tən/, inhibitor /ɪnˈhɪbɪtɚ/, hygiene /ˈhaɪˌd͡ʒiːn/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como narcolepsy, sleepiness, daytime.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.