Kutipiya memang. Belum ketemu penelitian yg mengindikasikan bhw 8 jam/hr itu yg optimal sih (barangkali teman2 yg lain bisa bantu carikan?). Walaupun di berbagai situs ttg sleep, 8 jam ini yg dianjurkan.

Tentang makanan,misalnya, kita bisa hitung jelas berapa kalori yang kita butuhin setiap hari, tergantung aktifitias juga, tapi tidur? Harusnya berbeda dong antara pekerja bangunan sama yang kerja kantoran, apalagi yang pake mobil + supir sendiri, di kantor ber-AC, duduk2, makanan bagus. Apa orang seperti ini juga butuh 8 jam tidur?

KutipTapi aq dkk dulu pernah nanya soal ini sama satu prof di bidang circadian clock, menurut dia sih kebutuhan tiap org beda2, jd nggak harus 8 jam. Bisa jadi si A butuh cuma 5 jam, sedangkan si B sebaliknya butuh 10 jam gitu, dan bgm circadian clock tiap orang ini katanya bisa di-tes (cuma trus kita nggak lanjut ngobrolnya krn keburu makanan datang hehehe... lagi ada acara waktu itu  )

Jadi bener beda-beda yahh. Sayang saya belum tau soal circadian clock ini  testnya pake apa yahh kira2

KutipPertanyaan lain: sepanjang waktu kita tidur itu khan terdiri dr beberapa cycle nonREM - REM. Kegunaan fisiologis tiap cycle ini apa? Kalau misalnya si A cuma butuh tidur setiap harinya 5 jam, misalnya, berarti ada fungsi fisiologis yg berbeda (berkurang?) dong dg si B yg butuh 8 or 10 jam gitu?

Nah ini juga menarik yahh. Kenapa ada NREM-REM ini. Maksudnya fungsi fisiologis yang berbeda gimana yahh? Total REMnya?

KutipWhile most theories suggest a role for non-rapid eye movement (NREM) sleep in energy conservation and in nervous system recuperation; REM sleep is ‘paradoxical’ in the sense that although an animal in REM sleep is behaviourally sleep, brain metabolic and neuronal activity are high, respiration and heart rate are variable, rapid eye movements and twitches of the extremities occur and males frequently develop erections. These phenomena and the vivid dreams that humans report upon awakening from REM sleep have made the function of this state particularly mysterious and intriguing. Although behavioural immobility and reduced overall body metabolic rate relative to active waking are maintained, why has this state evolved when
continued NREM sleep, with its reduction in brain metabolic activity, would seem to be more efficient at achieving the recuperative and energy-saving effects of sleep?

Apa memang REM hanya untuk menjaga agar kita gak bablas  karena kalau dari artikel itu pada beberapa binatang, mereka akan terbangun begitu mencapai onset REM ini. Sebaliknya respon motorik dan sensoriknya berkurang jika terbangun sebelum itu. Kalo waktu belajar REM ini di kuliah, katanya NREM itu buat recover fisiologis, REM neurologis. Tapi sepertinya lebih dari itu yahh 

Kutiprapid eye movements and twitches of the extremities occur and males frequently develop erections.

Ini bukannya karena pengaruh pada prostat karena kandung kemih yang terlalu penuh yah 

KutipREM sleep amount is positively correlated with total sleep amount and negatively correlated with body weight. However, if one statistically controls for body weight or brain weight, REM sleep amount is most strongly correlated with immaturity at birth. REM sleep amount is positively correlated with total sleep amount and negatively correlated with body weight.

Hmm... belum jelas arahnya ke mana ini.

Ntar saya juga coba cari2 lagi artikel tentang ini deh...

Kutipaku nggak lihat ada artikel review yg lebih baru. Sampai saat ini soal tidur ini memang masih terus diteliti sih (malah kayaknya semakin nge-trend riset di bidang ini, dilihat dr jumlah artikelnya  ).

Moga2 ditemuin gimana caranya biar gak usah tidur 

Kutip

Kutip dari: peregrin pada Februari 15, 2007, 01:26:14 AM

KutipYang masih jadi pertanyaan buat gue...ngaruh ngga sih kl kita punya jam tidur yg kebalik? (mis: tidur pagi-siang, ngga tidur malem-pagi).. Atau badan kita release hormon/chemicals tertentu pada malam hari yg ga bagus? *kaya tumbuhan*

Yang jelas, efek sampingnya bisa jadi insomnia atau hipersomnia. Tapi nggak semua orang mengalami efek samping ini sih.
Soal jam tidur kebalik ini (utk org2 yg kerjanya night-shift) termasuk problem juga ternyata:
[pranala luar disembunyikan, sila masuk atau daftar.]

Lho, sekarang saya masih bangun pdl jam 2 pagi, sementara peregrin juga masih bangun, jam 10 malam (?)... ini hanya kebiasaan aja menurut saya. Masalahnya kalo pun kita bangun jam 2 pagi begini biasanya bengong, gak ada kerjaan, paling gangguin temen kost (hehe inget wkt ngontrak bareng temen2 pada ngamuk digedor2 jam 3 minta ditemenin  ;D).

wah detil banget baca artikel dan kasih pertanyaannya  ... salut!

yg lain mana yah? pada nggak ada yg punya masalah dg tidur mungkin ya

ntar deh aku cari2 lagi artikel lain, sementara break dulu.

Jam 3 pagi gedor2 teman?  ... sama, tapi dulu aq yg digedor2 teman2 baru pulang dr bar, nawarin kentang goreng 

KutipLho, sekarang saya masih bangun pdl jam 2 pagi, sementara peregrin juga masih bangun, jam 10 malam (?)... ini hanya kebiasaan aja menurut saya. Masalahnya kalo pun kita bangun jam 2 pagi begini biasanya bengong, gak ada kerjaan, paling gangguin temen kost (hehe inget wkt ngontrak bareng temen2 pada ngamuk digedor2 jam 3 minta ditemenin  ).

dosen saya dulu bilang, agar belajar lebih efektif itu setidaknya dilakukan dengan tiga hal : sensorik (baca atau dengar), motorik (menulis dalam hal itu mencet kibord  ) dan yang terakhir ada emosi. Nah berhubung ini pengalaman pribadi jadi lebih pas 

Thanks yahh dah share banyak artikel2nya 

Btw, maenannya ke bar tapi kentang goreng? yang bener nih hehe

Iseng lagi

40 FACTS ABOUT SLEEP YOU PROBABLY DIDN'T KNOW...

[pranala luar disembunyikan, sila masuk atau daftar.]

-The record for the longest period without sleep is 18 days, 21 hours, 40 minutes during a rocking chair marathon. The record holder reported hallucinations, paranoia, blurred vision, slurred speech and memory and concentration lapses.

- It's impossible to tell if someone is really awake without close medical supervision. People can take cat naps with their eyes open without even being aware of it.

- Anything less than five minutes to fall asleep at night means you're sleep deprived. The ideal is between 10 and 15 minutes, meaning you're still tired enough to sleep deeply, but not so exhausted you feel sleepy by day.

- A new baby typically results in 400-750 hours lost sleep for parents in the first year

- One of the best predictors of insomnia later in life is the development of bad habits from having sleep disturbed by young children.

- The continuous brain recordings that led to the discovery of REM (rapid eye-movement) sleep were not done until 1953, partly because the scientists involved were concerned about wasting paper.

- REM sleep occurs in bursts totalling about 2 hours a night, usually beginning about 90 minutes after falling asleep.

- Dreams, once thought to occur only during REM sleep, also occur (but to a lesser extent) in non-REM sleep phases. It's possible there may not be a single moment of our sleep when we are actually dreamless.

- REM dreams are characterised by bizarre plots, but non-REM dreams are repetitive and thought-like, with little imagery - obsessively returning to a suspicion you left your mobile phone somewhere, for example.

- Certain types of eye movements during REM sleep correspond to specific movements in dreams, suggesting at least part of the dreaming process is analagous to watching a film

- No-one knows for sure if other species dream but some do have sleep cycles similar to humans.

- Elephants sleep standing up during non-REM sleep, but lie down for REM sleep.

- Some scientists believe we dream to fix experiences in long-term memory, that is, we dream about things worth remembering. Others reckon we dream about things worth forgetting - to eliminate overlapping memories that would otherwise clog up our brains.

- Dreams may not serve any purpose at all but be merely a meaningless byproduct of two evolutionary adaptations - sleep and consciousness.

- REM sleep may help developing brains mature. Premature babies have 75 per cent REM sleep, 10 per cent more than full-term bubs. Similarly, a newborn kitten puppy rat or hampster experiences only REM sleep, while a newborn guinea pig (which is much more developed at birth) has almost no REM sleep at all.

- Scientists have not been able to explain a 1998 study showing a bright light shone on the backs of human knees can reset the brain's sleep-wake clock.

- British Ministry of Defence researchers have been able to reset soldiers' body clocks so they can go without sleep for up to 36 hrs. Tiny optical fibres embedded in special spectacles project a ring of bright white light (with a spectrum identical to a sunrise) around the edge of soldiers' retinas, fooling them into thinking they have just woken up. The system was first used on US pilots during the bombing of Kosovo.

- Seventeen hours of sustained wakefulness leads to a decrease in performance equivalent to a blood alcohol-level of 0.05%.

- The 1989 Exxon Valdez oil spill off Alaska, the Challenger space shuttle disaster and the Chernobyl nuclear accident have all been attributed to human errors in which sleep-deprivation played a role.

- The NRMA estimates fatigue is involved in one in 6 fatal road accidents.

- Exposure to noise at night can suppress immune function even if the sleeper doesn’t wake. Unfamiliar noise, and noise during the first and last two hours of sleep, has the greatest disruptive effect on the sleep cycle.

- The "natural alarm clock" which enables some people to wake up more or less when they want to is caused by a burst of the stress hormone adrenocorticotropin. Researchers say this reflects an unconscious anticipation of the stress of waking up.

- Some sleeping tablets, such as barbiturates suppress REM sleep, which can be harmful over a long period.

- In insomnia following bereavement, sleeping pills can disrupt grieving.

- Tiny luminous rays from a digital alarm clock can be enough to disrupt the sleep cycle even if you do not fully wake. The light turns off a "neural switch" in the brain, causing levels of a key sleep chemical to decline within minutes.

- To drop off we must cool off; body temperature and the brain's sleep-wake cycle are closely linked. That's why hot summer nights can cause a restless sleep. The blood flow mechanism that transfers core body heat to the skin works best between 18 and 30 degrees. But later in life, the comfort zone shrinks to between 23 and 25 degrees - one reason why older people have more sleep disorders.

- A night on the grog will help you get to sleep but it will be a light slumber and you won't dream much.

- After five nights of partial sleep deprivation, three drinks will have the same effect on your body as six would when you've slept enough.

- Humans sleep on average around three hours less than other primates like chimps, rhesus monkeys, squirrel monkeys and baboons, all of whom sleep for 10 hours.

- Ducks at risk of attack by predators are able to balance the need for sleep and survival, keeping one half of the brain awake while the other slips into sleep mode.

- Ten per cent of snorers have sleep apnoea, a disorder which causes sufferers to stop breathing up to 300 times a night and significantly increases the risk of suffering a heart attack or stroke.

- Snoring occurs only in non-REM sleep

- Teenagers need as much sleep as small children (about 10 hrs) while those over 65 need the least of all (about six hours). For the average adult aged 25-55, eight hours is considered optimal

- Some studies suggest women need up to an hour's extra sleep a night compared to men, and not getting it may be one reason women are much more susceptible to depression than men.

- Feeling tired can feel normal after a short time. Those deliberately deprived of sleep for research initially noticed greatly the effects on their alertness, mood and physical performance, but the awareness dropped off after the first few days.

- Diaries from the pre-electric-light-globe Victorian era show adults slept nine to 10 hours a night with periods of rest changing with the seasons in line with sunrise and sunsets.

- Most of what we know about sleep we've learned in the past 25 years.

- As a group, 18 to 24 year-olds deprived of sleep suffer more from impaired performance than older adults.

- Experts say one of the most alluring sleep distractions is the 24-hour accessibility of the internet.

- The extra-hour of sleep received when clocks are put back at the start of daylight in Canada has been found to coincide with a fall in the number of road accidents.

Astaga! Itu artikelnya (post yang ini) ternyata pertanyaan sama persis sama pertanyaan saya ini yahh  Ah, peregrin kenapa baru ngasih sekarang sih artikelnya  hehe... bentar ah, lanjut lagi bacanya... btw, artikel itu tapi gak bisa jawab juga yahh 

Saying that it is desirable to be well rested and that the body seeks lost sleep with a vigour comparable to or greater than that displayed for food or sex does not answer the question of the functional role of sleep.

Why do we spend one-third of our lives asleep?

Why has our body evolved to press us relentlessly to make up for lost sleep?

Can we separate the drive for sleep, manifested in sleepiness, from the function of sleep, as we can separate hunger from the benefits of food consumption?

Why do so many species habitually sleep much more than humans, and others much less, and how do species that sleep for only short periods accomplish the functions of sleep in less time?

Why does the daily sleep amount decrease from birth to maturity in all species oftterrestrial mammals?

Why do we have two kinds of sleep, rapid eye movement (REM) and non-REM (NREM) sleep?

KutipAstaga! Itu artikelnya (post yang ini) ternyata pertanyaan sama persis sama pertanyaan saya ini yahh   Ah, peregrin kenapa baru ngasih sekarang sih artikelnya   hehe...

ya sorry... waktu itu khan belum ngerti cara attach hehe... maaf ya, gaptek banget nih .. trus nggak yakin jg kalo gpp post artikel yg gak gratis (waktu ituu, kalo skr sih EGP deh  )

Kutipbtw, artikel itu tapi gak bisa jawab juga yahh 

tul... 

tp tetap aja menarik utk dibaca2 ya ... ini koleksi lain

yg ini belum sempat baca  ... br aja nemu

btw, boleh dong attach lebih dr 2? biar sekalian gitu

Kutipya sorry... waktu itu khan belum ngerti cara attach hehe... maaf ya, gaptek banget nih .. trus nggak yakin jg kalo gpp post artikel yg gak gratis (waktu ituu, kalo skr sih EGP deh  )

Asikk... dapet supply gratisann  attachment itu hidden kok. Guest gak bisa liat dan post di atas 10 baru bisa download 

Kutip dari: peregrin pada Februari 18, 2007, 11:28:27 PM
yg ini belum sempat baca  ... br aja nemu

btw, boleh dong attach lebih dr 2? biar sekalian gitu

Ubah jadi berapa yahh? 5 cukup ga? abis ini dinaikin lagi deh.
Wahh... enak bener nih banyak bahan bacaan malam ini.

 

5 cukup lah kayanya  ...

KutipGuest gak bisa liat dan post di atas 10 baru bisa download 

bagus.. bagus.. 

KutipWahh... enak bener nih banyak bahan bacaan malam ini.

haha... wah bakal begadang lagi nih 

sama kalo gitu 

Udah . 5 attach per post, Max 5MB n 2MB per file. Kalo kurang ntar diganti lagi 

Wew... bukannya ujiannya April? begadangnya dari skrg ckckck... anak pintar   

KutipUdah   5 attach per post, Max 5MB n 2MB per file. Kalo kurang ntar diganti lagi   

asyiik ... ntar kapan2 aq cari2kan artikel lagi ya 

KutipWew... bukannya ujiannya April? begadangnya dari skrg    ckckck...

bukaan... ujian yg pertama jumat tgl. 23 ini  ... ntar maret dan april ada lagi 2 yg lain  ... kalau hari biasa susah bagi waktu, soalnya mesti kerja lab dan ada tugas2 lain jg, udah capek jd kalo malam  ... makanya kalo bisa hr ini pingin baca lumayan banyak lah ...

Kutipanak pintar   

ngecee...  ... kalo pintar gak pontang-panting gini  ... yg pintar tuh reborn 

Kutipasyiik ... ntar kapan2 aq cari2kan artikel lagi ya

siap2 beli harddisk kalo gitu, takut gak cukup 

Kutipbukaan... ujian yg pertama jumat tgl. 23 ini  ... ntar maret dan april ada lagi 2 yg lain  ... kalau hari biasa susah bagi waktu, soalnya mesti kerja lab dan ada tugas2 lain jg, udah capek jd kalo malam   ... makanya kalo bisa hr ini pingin baca lumayan banyak lah ...

fiuhh... bacanya aja udah capek gimana peregrin  topicnya yang omics itu yahh? Kemaren baca gak ngert  kok isinya statistika semua sih 

Kutipngecee...

disuruh ngaca yahh 

Ya udah, met baca2 yah. sukses ujiannya 

Kutipsiap2 beli harddisk kalo gitu, takut gak cukup   

hehehe 

Kutipbacanya aja udah capek gimana peregrin    topicnya yang omics itu yahh? Kemaren baca gak ngert    kok isinya statistika semua sih   

ya aq jg capek  ... bahannya semua yg menyangkut kimia analisis sih    omics yg kemarin salah satunya ... tp dosennya yg menguji ntar org chemometrics  ... dan test oral-nya cm 30 min, moga2 pertanyaannya gak ttg problem omics itu melulu 

KutipYa udah, met baca2 yah. sukses ujiannya   

tenkyu 

kalau saya mendefinisikan tidur adalah bukan istirahat atau emang kebutuhan tubuh untuk metabolisme, tapi tidur bagi saya adalah kondisi  terputusnya hubungan psikis dan pikiran saya dengan permasalahan yang saya sedang hadapi. misalnya saya sedang punya masalah dengan potongan rambut yang engga cocok dengan harapan saya; saya pecahin miror dirumah juga engga membantu saya untuk ngelupain sebel saya sama rambut saya, semuanya bikin engga PD aja, so daripada dipikir (untuk permasalahan yg lain juga) saya ambil jalan pintas : tidur. nah saat itulah saya dapat terlepas darisetiap beban pikiran (kalau engga bisa tidur juga, khan ada "Lelap").
tapi ibu saya bilang begini, lugu tp masuk akal jg "kenapa yah orang makin tua makin engga bisa tidur? oh mungkin tuhan sengaja kali kasih kondisi seperti itu, supaya orang tua bisa punya waktu banyak berdoa untuk "die preparing" (itu bahasa saya, karena ibu saya engga bisa inggris sama sekali).

sssssssssstttttttttttt
begadang berpengaruh ga sama pertumbuhan seseorang??