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Latest Photopigment Stories

2010-12-09 07:44:53

(Ivanhoe Newswire) -- Melanopsin, a light sensor that sets the circadian rhythm- the body's biological clock- also plays an important role in vision, according to this study.Melanopsin's messengers, called melanopsin-expressing retinal ganglion cells (mRGCs), forward information about the brightness of incoming light directly to visual centers in the brain.The results show a new role for mRGCs during image-forming vision, and suggest that these cells could make a significant contribution to...

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2010-12-08 10:26:17

Better known as the light sensor that sets the body's biological clock, melanopsin also plays an important role in vision: Via its messengers-so-called melanopsin-expressing retinal ganglion cells, or mRGCs-it forwards information about the brightness of incoming light directly to conventional visual centers in the brain, reports an international collaboration of scientists in this week's issue of PLoS Biology. The findings reveal a new role for mRGCs during image-forming vision and suggest...

2009-10-13 15:11:30

Ever wonder how your eyes adjust during a blackout? When we go from light to near total darkness, cells in the retina must quickly adjust. Vision scientists at Washington University School of Medicine in St. Louis have identified an intricate process that allows the human eye to adapt to darkness very quickly. The same process also allows the eye to function in bright light. The discovery could contribute to better understanding of human diseases that affect the retina, including age-related...

2005-06-16 22:20:00

Researchers have discovered that a set of light-responsive retinal cells that form connections to the circadian clock are functional very early in development, from the day of birth. Although the cells are sensitive to light, they do not participate in image formation, a process that matures later on. The work has been reported in the journal Current Biology by Sumathi Sekaran, of Imperial College London, and colleagues there and at John Hopkins University and the University of Manchester....


Word of the Day
siliqua
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'
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