How do ipRGCs effect our sleep and health?

siod_eye_cells_04The 24  hour biological clock that creates a balance for  health and harmony in the body runs on light. Changes in levels of in light effect the photosensitive retinal ganglion cells (ipRGCs).  located behind the rods and cones of the retina in the eye. When darkness falls and we go to bed. As the eyes close, the change in light intensity (or lack of light) is registered on these ipRGC cells and a message is sent to the hypothalamicCircadian rhythm Suprachiasmatic Nucleus (SCN) and the olivarypretectal nucleus (OPN) located in the frontal part of the brain (behind the area between your eyebrows)” it is time to sleep”. Then the SCN and OPN begin the night time hormone production. This cascade of hormones is part of the   body’s  circadian rhythms.

There is only 1,000 to 2,000cells gauge the overall light intensity branch-like  ipRGCs eye cells in mammals are responsible for telling the body clock whether it was day or night and when to turn melatonin on for a restful sleep.

Next Importance of melatonin to our health and wellness.

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Pesticides and children's obesity

“Exposure to pesticides in utero can double a child’s chances of becoming obese, a new Spanish study has concluded. The study, published in the journal Acta Paediatrica, measured the level of the internationally banned (yet still freakishly persistent) pesticide hexachlorobenzene in the umbilical cords of over 400 children born on the Spanish island of Menorca. It found that the kids with the highest levels of HCB before birth were twice as likely to be obese at age six and a half. Previous studies have linked bisphenol A exposure to obesity in animals, and other studies have linked phthalates to obesity in adult men; the Spanish study honed in on the effects of HCB in young and unborn humans. “This is very important. It is the first good study of the effects on the fetus,” said Pete Myers, a scientist at Environmental Health Sciences in the U.S. “Its conclusions are not surprising, given what we know from the animal experiments, but it firmly links such chemicals to the biggest challenge facing public health today.”
sources: Grist: The parallels between accepting obesity and ignoring global warming