nocno svjetlo

[Felix]

koliko je nocno svjetlo (lampica sa slicicama i sl. sto se usteka direktno u stekdozu) (ne)stetno ako se koristi duze vrijeme cijelu noc?

jagor se napalio na lampicu s medom i obavezna je pri uspavljivanju. moje osobno misljenje je da bi prije zaspao da je u mraku, ali ok, vidim da mu je bitna. e sad, ponekad i po noci trazi da upalim medu, ali ne dam. mislim da bi losije spavao, vise se budio, i da opcenito drzanje svjetla po noci moze biti stetno za oci, razvoj mozga, itd. ali nemam nekih argumenata za to nego mi se tako cini. mm pak smatra da nema razloga da mu branimo svjetlo po noci.

ne znam jel stvar u meni (ne podnosim ikakvo svjetlo pri spavanju i vec mi ovo pri uspavljivanju jako smeta) ili ima nekih razloga da nije dobro da se dijete nauci spavati pri svjetlu, koliko god slabo bilo?

kakva su vasa iskustva, ako bi se dijete naucilo na spavanje u svjetlu, kad su poceli spavati u mraku?

[Zdenka2]

Mislim da se je nedavno odvijala rasprava o štetnosti noćnog svjetla u koju se nisam uključila, premda smo i mi imali taj problem. Ja sam od onih koji vole potpuni mrak i to me najbolje opušta za spavanje. M. je isto spavao u zamračenoj sobi, ali je u dobi od nekih 4-5 godina počeo osjećati strah noću i zahtijevao je noćno svjetlo - jednostavno nije htio spavati bez toga. Nisam baš bila s tim presretna, ali sam mu kupila noćnu lampicu, neku plavičastu, a poslije smajlića. Spavao je s tim neke 2-3 godine. Kad je B. došla i ona je tražila svjetlo. Kad je strah polako počeo jenjati, diskretno sam uklonila svjetlo i sada ga se više i ne sjete. Ali i dalje ne vole potpuno zamračenu sobu.

[Mamita]

ako hoćeš znanstveno evo me

radi se o melatoninu, hormonu ovisnom o svjetlu odnosno luči se samo po mraku.

s wikipedije:

Production of melatonin by the pineal gland is inhibited by light and permitted by darkness. For this reason melatonin has been called "the hormone of darkness" and its onset each evening is called the Dim-Light Melatonin Onset (DLMO). Secretion of melatonin as well as its level in the blood, peaks in the middle of the night, and gradually falls during the second half of the night, with normal variations in timing according to an individual's chronotype.

Until recent history, humans in temperate climates were exposed to only about six hours of daylight in the winter. In the modern world, artificial lighting reduces darkness exposure to typically eight or fewer hours per day all year round. Even low light levels inhibit melatonin production to some extent, but over-illumination can create significant reduction in melatonin production. Since it is principally blue light that suppresses melatonin,[23] wearing glasses that block blue light[24] in the hours before bedtime may avoid melatonin loss. Use of blue-blocking goggles the last hours before bedtime has also been advised for people who need to adjust to an earlier bedtime, as melatonin promotes sleepiness.

http://en.wikipedia.org/wiki/Melatonin

[Felix]

ne pise bas zasto je melatonin vazan. za reguliranje 'seasonal clocka', ima li nesto vaznije?

zdenka, sjecas li se gdje je bio taj topic?

[Felix]

aha, antioksidans, imunitet i sl.

[Ariens]

Nasla sam ovo SVJETLO DA ILI NE????

[Mamita]

Current and potential medical indications
Melatonin has been studied for the treatment of cancer, immune disorders, cardiovascular diseases, depression, seasonal affective disorder (SAD), circadian rhythm sleep disorders and sexual dysfunction. Studies by Alfred J. Lewy at Oregon Health & Science University and other researchers have found that it may ameliorate circadian misalignment and SAD.[43] Basic research indicates that melatonin may play a significant role in modulating the effects of drugs of abuse such as cocaine.[44]


[edit] Treatment of circadian rhythm disorders
Exogenous melatonin, used as a chronobiotic and usually taken orally in the afternoon and/or evening, is, together with light therapy upon awakening, the standard treatment for delayed sleep phase syndrome and non-24-hour sleep-wake syndrome. See Phase response curve, PRC. It appears to have some use against other circadian rhythm sleep disorders, such as jet lag and the problems of people who work rotating or night shifts.


[edit] Preventing ischemic damage
Melatonin has been shown to reduce tissue damage in rats due to ischemia in both the brain[45] and the heart;[46] however, this has not been tested in humans.


[edit] Learning, memory and Alzheimer's
Melatonin receptors appear to be important in mechanisms of learning and memory in mice,[47] and melatonin can alter electrophysiological processes associated with memory, such as long-term potentiation (LTP). The first published evidence that melatonin may be useful in Alzheimer's disease was the demonstration that this neurohormone prevents neuronal death caused by exposure to the amyloid beta protein, a neurotoxic substance that accumulates in the brains of patients with the disorder.[48] Melatonin also inhibits the aggregation of the amyloid beta protein into neurotoxic microaggregates which seem to underlie the neurotoxicity of this protein, causing death of neurons and formation of neurofibrillary tangles, the other neuropathological landmark of Alzheimer's disease.[48]

Melatonin has been shown to prevent the hyperphosphorylation of the tau protein in rats. Hyperphosphorylation of tau protein can also result in the formation of neurofibrillary tangles. Studies in rats suggest that melatonin may be effective for treating Alzheimer's disease.[49] These same neurofibrillary tangles can be found in the hypothalamus in patients with Alzheimer's, adversely affecting their bodies' production of melatonin. Those Alzheimer's patients with this specific affliction often show heightened afternoon agitation, called sundowning, which has been shown in many studies to be effectively treated with melatonin supplements in the evening.[50]


[edit] ADHD
Research shows that after melatonin is administered to ADHD patients, the time needed to fall asleep is significantly reduced. Furthermore, the effects of the melatonin after three months showed no change from its effects after one week of use.[51]


[edit] Fertility
Recent research has concluded that melatonin supplementation in perimenopausal women produces a highly significant improvement in thyroid function and gonadotropin levels, as well as restoring fertility and menstruation and preventing the depression associated with the menopause.[52] However, at the same time, some resources warn women trying to conceive not to take a melatonin supplement.[53]


[edit] Headaches
Several clinical studies indicate that supplementation with melatonin is an effective preventive treatment for migraines and cluster headaches.[54][55]


[edit] Mental disorders
Melatonin has been shown to be effective in treating one form of depression, seasonal affective disorder, [1] and is being considered for bipolar and other disorders where circadian disturbances are involved.[56] It has been observed that bipolar disorder might have a "trait marker" (something which is characteristic of being bipolar, that doesn't change with state) of supersensitivity of the melatonin receptors.[57] This could be contrasted with drug-free recovered bipolar people not showing light hypersensitivity.[58]


[edit] Cancer
Melatonin levels at night are reduced to 50% by exposure to a low-level incandescent bulb for only 39 minutes, and it has been shown that women with the brightest bedrooms have an increased risk for breast cancer.[59]

Reduced melatonin production has been proposed as a likely factor in the significantly higher cancer rates in night workers.[60]


[edit] Gallbladder Stones
Melatonin presence in the gallbladder has many protective properties, such as converting cholesterol to bile, preventing oxidative stress, and increasing the mobility of gallstones from the gallbladder.[61] It even decreases the amount of cholesterol produced in the gallbladder by regulating the cholesterol that passes through the intestinal wall. In guinea pigs, melatonin administration restored normal function by reducing inflammation after induced Cholecystitis, whether administered before or after onsent of inflammation.[61] Relatively speaking, concentration of melatonin in the bile is 2-3 times higher than daytime melatonin levels (in the brain) across many mammals, including humans.[62]


[edit] Other
Some studies have shown that melatonin has potential for use in the treatment of various forms of cancer, HIV, and other viral diseases; however, further testing is necessary to confirm this.[63]

Melatonin is involved in the regulation of body weight, and may be helpful in treating obesity (especially when combined with calcium).[64]

Histologically speaking, it is also believed that melatonin has some effects for sexual growth in higher organisms (quoted from Ross Histology and Wheather's Functional Histology).

[Felix]

fala cure. mogla sam koristiti pretraznik prije otvaranja novog topica

[Mamita]

nema veze ja volim kad imam vremena