How The Blind Sense and Use Light

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=MdYyhZLG3jo

DNews Audience Survey http://dne.ws/1dLMDtq • People who are blind, obviously can't see. But new research shows that while they can't see, their brains can! Anthony explains what this means and how this ability actually plays an important role in a blind person's everyday life. • Read More: • Circadian rhythm sleep disorders: lessons from the blind • http://www.sciencedirect.com/science/... • As totally blind people cannot perceive the light--dark cycle (the major synchroniser of the circadian pacemaker) their circadian rhythms often free run on a cycle slightly longer than 24 h. • Study With Totally Blind People Shows How Light Helps Activate the Brain • http://www.sciencedaily.com/releases/... • Light enhances brain activity during a cognitive task even in some people who are totally blind, according to a study conducted by researchers at the University of Montreal and Boston's Brigham and Women's Hospital. • Circadian rhythm abnormalities in totally blind people: incidence and clinical significance. • http://www.ncbi.nlm.nih.gov/pubmed/16... • When people are completely isolated from environmental time cues, their circadian rhythms free run with a nearly 24-h cycle, generated by an internal body clock. Free-running temperature, cortisol, and melatonin rhythms have also been described in totally blind people, even though they were living in normal society and had access to abundant time cues; thus an intact visual system may be essential for synchronization of the circadian system. • Ganglion Cell Layer • http://en.wikipedia.org/wiki/Ganglion... • The ganglion cell layer (ganglionic layer) is a layer of the retina that consists of retinal ganglion cells and displaced amacrine cells. • Watch More: • What Is Circadian Rhythm? • • How Your Brain's Internal Clock Works • TestTube Wild Card • http://testtube.com/dnews/dnews-437-p... • Stem Cells Cure Blindness • • Stem Cell Treatment Cures Blindness • ____________________ • DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories perspectives you won't find anywhere else! New videos twice daily. • Watch More DNews on TestTube http://testtube.com/dnews • Subscribe now! http://www.youtube.com/subscription_c... • DNews on Twitter / dnews • Anthony Carboni on Twitter / acarboni • Laci Green on Twitter / gogreen18 • Trace Dominguez on Twitter / trace501 • DNews on Facebook / dnews • DNews on Google+ http://gplus.to/dnews • Discovery News http://discoverynews.com

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