واضح آرشیو وب فارسی:ایسنا: دوشنبه ۱۹ آبان ۱۳۹۳ - ۰۱:۰۳
نتایج تحقیقات صورت گرفته توسط پژوهشگران انگلیسی و فرانسوی نشان میدهد، کارهای شیفتی باعث پیر شدن سریعتر مغز و کند شدن توانایی ذهنی افراد میشود. به گزارش سرویس پژوهشی ایسنا، ساعت داخلی بدن، ریتم شبانهروزی را کنترل میکند؛ اما انجام کارهای شیفتی باعث ایجاد اختلال در عملکرد این ساعت طبیعی شده و خطراتی مانند ابتلا به سرطان پستان و چاقی را افزایش میدهد. به گفته محققان، مغز به مرور زمان پیر میشود، اما کارهای شیفتی این روند را سریعتر میکند. محققان دانشگاه سوانسی با همکاری دانشگاه تولوز، تأثیر تغییر ساعت داخلی بدن را در بین کارمندان شیفتی مورد ارزیابی قرار دادند؛ در این پژوهش سه هزار شهروند فرانسوی در آزمونهای حافظه، سرعت تفکر و توانایی شناختی شرکت کردند. یک دهه کار شیفتی باعث پیر شدن سریعتر مغز میشود؛ بر این اساس، افرادی که بیش از 10 سال در مشاغل شیفتی حضور داشتند، در آزمونهای حافظه نتایجی مشابه افراد شش سال بزرگتر از خود را کسب کردند. محققان همچنین خاطر نشان میکنند که پس از ترک مشاغل شیفتی، پنج سال زمان برای بازیابی عملکرد طبیعی مغز نیاز است. دکتر «مایکل هستینگ» از محققان آزمایشگاه زیست مولکولی انگلیس تأکید کرد: نتایج این تحقیق برای کمک به بیماران دچار زوال عقل نیز کاربرد دارد، چراکه بسیاری از این افراد از اختلال خواب رنج میبرند و الگوهای خواب آنها مشابه افراد شاغل در مشاغل شیفتی است. نتایج این پژوهش در مجله Occupational and Environmental Medicine منتشر شد. انتهای پیام Shift work dulls your brain - report Working antisocial hours can prematurely age the brain and dull intellectual ability, scientists warn. Their study, in the journal Occupational and Environmental Medicine, suggested a decade of shifts aged the brain by more than six years. There was some recovery after people stopped working antisocial shifts, but it took five years to return to normal. Experts say the findings could be important in dementia, as many patients have disrupted sleep. The body"s internal clock is designed for us to be active in the day and asleep at night. The damaging effects on the body of working against the body clock, from breast cancer to obesity, are well known. Now a team at the University of Swansea and the University of Toulouse has shown an impact on the mind as well. Three thousand people in France performed tests of memory, speed of thought and wider cognitive ability. The brain naturally declines as we age, but the researchers said working antisocial shifts accelerated the process. Those with more than 10 years of shift work under their belts had the same results as someone six and a half years older. The good news is that when people in the study quit shift work, their brains did recover. Even if it took five years. "Substantial decline" Dr Philip Tucker, part of the research team in Swansea, told the BBC: "It was quite a substantial decline in brain function, it is likely that when people trying to undertake complex cognitive tasks then they might make more mistakes and slip-ups, maybe one in 100 makes a mistake with a very large consequence, but it"s hard to say how big a difference it would make in day-to-day life." He said he would not do night shifts "if I could possibly help it" but they were a "necessary evil" that society could not do without. "There are ways to mitigate the effects in the way you design work schedules and regular medical check-ups... should include cognitive performance tests to look for danger signs," he added. Dr Michael Hastings, from the UK Medical Research Council"s Laboratory of Molecular Biology, told the BBC: "The reversibility is a really exciting finding because no-one else has shown it and no matter how compromised a person may be there"s always hope of recovery." He said the findings may have important consequences in dementia, which is known to damage sleeping patterns in a similar way to shift work. "If you can keep the sleep-wake cycle as solid as possible you"re unlikely to reverse neurodegeneration, but you can ameliorate one of the consequences. "In nursing homes one thing you can do to help is to set a very clear daily routine to encourage a sensible 24-hour pattern of activity; it needs bright lights in the day, resting at night and appropriate medication such as melatonin before bed."
کد خبرنگار:
این صفحه را در گوگل محبوب کنید
[ارسال شده از: ایسنا]
[تعداد بازديد از اين مطلب: 28]