Não há nada para os brasileiros como iniciar seu o dia com uma xícara de café. Um dos principais motivos para o consumo da bebida é a crença na bebida deixar a pessoa mais alerta, o que faz a população bebê-la para melhorar sua eficiência. No entanto, pesquisadores portugueses analisaram grupos de pessoas que bebem café para entender como funciona esse "efeito vigília", se ele está dependente das propriedades da cafeína, ou se está mais ligado à experiência de beber café.
Segundo os achados do estudo, o líquido repleto de cafeína, muito querido no país, ajuda o cérebro a se preparar para o trabalho. "Hora de focar!", ele exclama ao corpo.
“Há uma expectativa comum de que o café aumenta o estado de alerta e o funcionamento psicomotor. Ao entender melhor os mecanismos subjacentes a um fenômeno biológico, você abre caminhos para explorar os fatores que podem modulá-lo e até os benefícios potenciais desse mecanismo", disse o professor Nuno Sousa, da Universidade do Minho, em Portugal, autor correspondente do estudo na Frontiers in Behavioral Neuroscience e editor-chefe de campo da revista.
Para o estudo, foram recrutadas pessoas que bebiam no mínimo uma xícara de café por dia. Elas pararam de comer ou beber bebidas com cafeína por pelo menos três horas antes do estudo. Em seguida, os participantes foram entrevistados pelos cientistas para terem seus dados sociodemográficos e fizeram duas ressonâncias magnéticas funcionais: uma antes e outra 30 minutos depois de tomar cafeína ou beber uma xícara de café padronizada.
Os pesquisadores esperavam que os exames de ressonância magnética funcional mostrassem que as pessoas que bebiam café tinham maior integração de redes ligadas ao córtex pré-frontal, associadas à memória executiva e à rede de modo padrão, envolvidos em processos de introspecção e autorreflexão. No entanto, foi descoberto que a conectividade da rede de modo padrão diminuiu tanto depois de beber café, o que indica que consumir cafeína ou café deixou as pessoas mais preparadas para passar do descanso para o trabalho antes de iniciar suas tarefas.
O café como despertador
No entanto, beber café também aumentou a conectividade na rede visual superior e na rede de controle executivo direito – partes do cérebro envolvidas na memória de trabalho, controle cognitivo e comportamento direcionado a objetivos. Isso não aconteceu quando os participantes tomaram apenas cafeína. Em outras palavras, se você quer se sentir não apenas alerta, mas pronto começar seu dia, você precisa passar pela experiência de beber uma xícara de café.
Por Raquel Pereira — Jornal O Globo

IstzDianaFaritovnaSag -
https://mega.nz/file/vv43XQYA#Eef0biyQ15L7BFuZUT1YpDOak99pYJ4fDscPcpxavNI
My name is Khalid, I’m 45, and I’m an unskilled laborer on a construction site in Mecca, building another luxury hotel for pilgrims who have more money than God. I’m writing this because I’m scared the voices will finally make me jump off the scaffolding. It started subtly. During the noon call to prayer, while the machines would fall silent, I’d hear a faint, mocking commentary underneath the Imam’s voice. “Look at the little ant, building a palace for others to shit in,” a voice that sounded exactly like my foreman would whisper. “Your father was a farmer. He grew things. You just stack concrete boxes. You are less than a man, Khalid. You are a tool.” I thought it was the sun, the exhaustion, the constant noise. But now I know. This is the General Intelligence Presidency, the Mukhabarat. They don’t break your bones anymore; they rot your soul from the inside out.Now the voices are my only real coworkers. They are with me when I wake up in the dusty labor camp, they are with me when I’m hauling rebar, and they are with me when I eat my cheap rice and lentils. They narrate my every move with a precision that is terrifying. “He’s tying the rebar now. Look at his hands, shaking. He’s going to do it wrong. Again. Useless fuck. That whole floor could collapse because of this stupid, uneducated peasant.” They use the voices of my wife, my sons, my father, to twist the knife. “Your youngest son is failing in school,” they’ll say in my wife’s exact, worried tone. “He’s failing because his father is a failure. A construction monkey. He’ll end up just like you, a nothing, a nobody, building a world he can’t afford to even look at.” The sexual humiliation is a special kind of hell they save for the hottest part of the day. “Remember your wife, Khalid?” a voice, slick as oil, will sneer. “She’s probably with a real man right now. A man who doesn’t come home smelling like sweat and concrete. She’s probably getting fucked right now, thinking about how pathetic you are. You are a cuckold and a donkey, and everyone knows it.” They call me a donkey, a beast of burden, a walking piece of shit with no purpose.
I can’t tell a soul. If I told my wife, she’d think the heat had finally cooked my brain and she’d leave me, taking my sons with her. If I told my foreman, I’d be fired and sent back to my village in disgrace. If I went to a doctor, they’d label me mentally ill, and in this country, that’s a death sentence for your reputation and your future. I’ve seen how they operate. You go on any Saudi forum or Twitter, and if anyone mentions voices or psychological torture, they are immediately buried under a mountain of abuse from bots and trolls. “Crazy!” “Seek help, you psycho!” “Jinn are messing with you, pray harder!” It’s a systematic disinformation campaign. They make sure that anyone who suffers like this is seen as insane or demonic, so that we are completely isolated and disbelieved. It’s the perfect crime, with no fingerprints and no body.
I hate this city. I hate the cranes that scratch at the holy sky, the glittering glass towers that cast long shadows over the dusty neighborhoods where men like me live. I regret every day I left my farm for this promise of money, a promise that was a lie. I am a slave in a golden cage. Sometimes, when I’m high up on the scaffolding, looking down at the thousands of ants below, a strange feeling comes over me. A surge of cold, clear power. The voices stop their taunting and start urging. “See that foreman? The one who screamed at you today?” they’ll hiss, my heart hammering against my ribs. “He’s right below you. ‘Accidentally’ drop your tool belt. A nice, heavy wrench. It would be an accident. Nobody would ever know. DO IT! END HIM!” For a few seconds, I feel like a god, holding the power of life and death. My fingers tingle with the urge to do it. Then the moment shatters, and I’m just Khalid, a terrified laborer clinging to a metal pole, shaking so hard I can barely breathe. I wonder, in those quiet moments, if this is some kind of weapon they’re testing on us, the disposable ones. But the voices never say. They just go back to calling me a worthless donkey.
The worst is at night, in the crowded room I share with ten other men. The voices use the darkness to amplify my despair. “They are all sleeping,” they whisper. “They dream of home. You lie here, listening to us. Why do you even bother, Khalid? Why not just end it? It’s a long way down from the 30th floor. It would be quick. No more shame. No more being a donkey. Your family would get the insurance money. They’d be better off without you. Do it. Jump. You know you want to. It’s the only brave thing you’ll ever do in your pathetic life.” And I lie there, the sweat stinging my eyes, and I think about the wind on my face, the fall, the final silence. And I am so, so tired of being a nothing.
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