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Latest Visual system Stories

2013-02-11 10:54:37

Ultraviolet vision evolved at least eight times in birds from a common violet sensitive ancestor finds a study published in BioMed Central's open access journal BMC Evolutionary Biology. All of these are due to single nucleotide changes in the DNA. Modern daytime birds either have violet sensitive or ultraviolet sensitive vision. Being ultraviolet sensitive alters visual cues used to select a mate, avoiding predators, and in finding food. Researchers from Uppsala University and the Swedish...

2013-02-07 15:27:50

Among the animals that are appealing “cover models” for scientific journals, lancelets don´t spring readily to mind. Slender, limbless, primitive blobs that look pretty much the same end to end, lancelets “are extremely boring. I wouldn´t recommend them for a home aquarium,” says Enrico Nasi, adjunct senior scientist in the MBL´s Cellular Dynamics Program. Yet Nasi and his collaborators managed to land a lancelet on the cover of The Journal of...

Studying ACh In Rats
2013-01-24 18:51:34

Alan McStravick for redOrbit.com — Your Universe Online Ivan Pavlov, a Russian physiologist, was instrumental in the formation of the school of study of conditioned response. His work, spanning some 40 years, has pervaded the public consciousness ever since. We are all, in one way or another, unwitting participants in his research. For instance, who among us doesn´t jump up to grab our mobile phone when it dings at us, signaling an incoming text message or e-mail?...

2013-01-17 10:35:47

New research in Nature concludes the eye — which depends on light to see — also needs light to develop normally during pregnancy. Scientists say the unexpected finding offers a new basic understanding of fetal eye development and ocular diseases caused by vascular disorders — in particular one called retinopathy of prematurity that can blind premature infants. The research, led by scientists at Cincinnati Children's Hospital Medical Center and the University of...

Glaucoma Research Points To Potential Early Indicator
2013-01-02 13:21:05

Lee Rannals for redOrbit.com - Your Universe Online A new study has found that certain changes in blood vessels in the eye's retina can be an early sign that a person may have an increased risk of glaucoma. Researchers wrote in the journal Ophthalmology that they found that patients who have abnormally narrow retinal arteries are more likely to develop glaucoma 10 years down the road. The research could eventually provide ophthalmologists with a new tool to identify and treat those...

2013-01-02 10:42:12

Scientists have developed a quick, easy and cheap vision test to find out which part — and how much — of the brain of a stroke victim has been damaged, potentially enabling them to save more lives. The test requires patients to look into a device for about ten minutes, enabling it to be used in the early stages of a stroke — even if the patient cannot move their limbs or speak. This can help doctors diagnose and treat the stroke quickly and accurately, which is vital,...

Dragonflies Show Human-like Selective Attention
2012-12-21 05:48:24

[ Watch the Video: Dragonfly on the Hunt ] redOrbit Staff & Wire Reports - Your Universe Online Researchers from the University of Adelaide have uncovered the first evidence that invertebrates, like primates, have brain cells dedicated to the process of selective attention. Writing in the journal Current Biology, Dr. Steven Wiederman and associate professor David O'Carroll from the university's Centre for Neuroscience Research describe how they were able to learn that...

2012-12-19 13:52:01

San Francisco, CA, Dec. 15-19, 2012 Moscone Center, 747 Howard Street ORGANIZING THE EYE'S NEURONS Poster: 2342/B1205 Special Interest Subgroup: Tissue Development and Morphogenesis II Tuesday, Dec. 18, 2012; Exhibit Halls A-C, 12:30 — 2 p.m. Authors: A. R. Tomás and M. R. Deans Tomás and Deans have identified a protein needed for neuron organization in the developing retina. The team says that the study helps reveal how the healthy retina...


Latest Visual system Reference Libraries

Eye
2013-04-30 13:41:59

1. vitreous body 2. ora serrata 3. ciliary muscle 4. ciliary zonules 5. canal of Schlemm 6. pupil 7. anterior chamber 8. cornea 9. iris 10. lens cortex 11. lens nucleus 12. ciliary process 13. conjunctiva 14. inferior oblique muscle 15. inferior rectus muscle 16. medial rectus muscle 17. retinal arteries and veins 18. optic disc 19. dura mater 20. central retinal artery 21. central retinal vein 22. optic nerve 23. vorticose vein 24. bulbar sheath 25. macula 26. fovea 27. sclera 28....

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Word of the Day
Cthulhu
  • A gigantic fictional humanoid alien god being described with a head resembling an octopus and dragon wings and claws, around whom an insane cult developed.
  • Pertaining to the mythos of Cthulhu and additional otherworldly beings created by H. P. Lovecraft or inspired by his writings and imitators.
This word was invented in 1926 by H.P. Lovecraft for his short story, 'The Call of Cthulhu.' 'Cthulhu' may be based on the word 'chthonic,' which in Greek mythology refers to the underworld.
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