You blink about every 4-6 seconds, says David Burr in Current Biology,1 adding to over 17,000 blinks a day. Each time the world goes black for 100 to 150 milliseconds, as the eyelids attenuate the light a hundredfold. Why don’t we see the world like a flickering movie? We generally perceive an uninterrupted stream of visual information. It turns out that there is a synchronized interlock between the blink response and the visual cortex of the brain, such that the brain temporarily suppresses vision during each blink. To find this out, a team of scientists in London, also publishing in Current Biology,2 repeated a 25-year-old ingenious experiment, but this time added functional MRI imaging on the brain. They made the retina see continuous light by shining it up the palate of test subjects wearing lightproof goggles, then watched how the brain reacted during blinks, even though the light seen by the retina (through the mouth) was continuous. Sure enough, the brain anticipated each blink by suppressing the visual cortex during the blink. This means that we don’t see the dark; when we blink, the brain just skips the interruption. See also the summary on EurekAlert.1David Burr, “Vision: In the Blink of an Eye,” Current Biology, Vol 15, R554-R556, 26 July 2005.2Bristow et al., “Blinking Suppresses the Neural Response to Unchanging Retinal Stimulation,” Current Biology, Vol 15, 1296-1300, 26 July 2005.While this feat was evolving, we wonder if it was like the early fighter planes trying to shoot machine guns through the propeller. Until engineers figured out how to synchronize the firing between the propeller blades, how many test pilots shot themselves down? (Uh, whoops….) How many cheetahs in a full gallop had to learn to coordinate their attacks when the lights were on, till they got frustrated and sent their brains back to Tinker Bell’s workshop for an upgrade?(Visited 10 times, 1 visits today)FacebookTwitterPinterestSave分享0
Social Emotional Development in the Early Years: Understanding Social Emotional DevelopmentDate: June 18, 2015Time: 11am-12:30pm EasternLocation: Social Emotional Development in the Early Years: Understanding Social Emotional DevelopmentCreative Commons Licensing [Flickr, Mi Nene-October 4, 2013] Jenna Weglarz-Ward, M.Ed., and Kimberly Hile, M.Ed., will discuss the importance of social emotional development and lifelong outcomes for young children with disabilities. Weglarz-Ward and Hile will discuss specific topics including: 1) Evidence-based outcomes for young children with disabilities related to achieving developmental milestones, school and academic success, and developing life skills, 2) Social emotional developmental milestones for young children birth to five years, 3) Cultural, ethnic, racial, and linguistic influences and variations on milestone achievement, 4) Impact of disability on milestone achievement, 5) Typical challenges for children with disabilities, and 6) Parent coaching strategies to support parents’ facilitation of their children’s social emotional development.MFLN FD Early Intervention webinars offer CE Credits through the Early Intervention Training Program (EITP) at the University of Illinois. To find out further information, click here. The EI team is actively pursuing more CEU opportunities in states other than Illinois. Please check back frequently to the webinar Learn Event web page to receive updates on our progress. Access to the webinar Learn Event page can be found, here.For more information on future presentations in the 2015 Family Development webinar series, please visit our professional development website or connect with us via social media for announcements: Facebook & Twitter.