Featured Research

from universities, journals, and other organizations

'Blindsight' used in everyday life scenes: Subjects with visual impairment turn eyes to motion, brightness, and color

Date:
June 28, 2012
Source:
National Institute for Physiological Sciences
Summary:
Scientists have demonstrated that blindsight in monkeys is available not only under the specific conditions of the laboratory, but also in everyday environments.

The visual information from eyes is sent into the brain unconsciously even if you are not aware. One of examples of unconscious seeing is a phenomenon of "blindsight" [Subjects have no awareness, but their brains can see ] in subjects with visual impairment, caused by the damage of a part of the brain called the visual cortex. Although it is already reported that the patients with damage in the visual cortex, who were not aware of seeing, can walk and avoid obstacles, it was not proved whether this was really blindsight.

In this new study, the international collaborative research team including Assistant Professor Masatoshi Yoshida and Professor Tadashi ISA from The National Institute for Physiological Sciences, The National Institutes of Natural Sciences, Japan and Professor Laurent Itti from the University of Southern California demonstrated that blindsight in monkeys is available not only under the specific conditions of the laboratory, but also in everyday environments. This research result will appear in Current Biology as an electronic version on June 28th 2012.

The researchers previously showed blindsight in monkeys -- monkeys with damage in the visual area of the brain are able to turn their eyes to 'unseen' visual stimuli. At this time, the research team examined whether blindsight occurs not only under the specific conditions of the laboratory, but also in everyday environments. They recorded eye movements of the blindsight monkeys freely watching video clips of everyday life scenes. They found that the monkeys were able to turn their eyes to the prominent portions in term of motion, brightness or color. By looking at eye movements of the monkeys with visual disability, we can understand where they pay attention to, although they do not see.

Assistant Professor YOSHIDA said, "this new finding indicates that blindsight can be used in everyday life of patients with hemianopia by cerebrovascular disorder. Then, there is the possibility that patients with visual impairment can recover their hidden visual function by rehabilitation." He also said "measurement of eye movements during viewing movie clips can be an efficient method to examine how well the patients can see unconsciouly."


Story Source:

The above story is based on materials provided by National Institute for Physiological Sciences. Note: Materials may be edited for content and length.


Journal Reference:

  1. Masatoshi Yoshida, Laurent Itti, DavidJ. Berg, Takuro Ikeda, Rikako Kato, Kana Takaura, BrianJ. White, DouglasP. Munoz, Tadashi Isa. Residual Attention Guidance in Blindsight Monkeys Watching Complex Natural Scenes. Current Biology, 2012; DOI: 10.1016/j.cub.2012.05.046

Cite This Page:

National Institute for Physiological Sciences. "'Blindsight' used in everyday life scenes: Subjects with visual impairment turn eyes to motion, brightness, and color." ScienceDaily. ScienceDaily, 28 June 2012. <www.sciencedaily.com/releases/2012/06/120628164438.htm>.
National Institute for Physiological Sciences. (2012, June 28). 'Blindsight' used in everyday life scenes: Subjects with visual impairment turn eyes to motion, brightness, and color. ScienceDaily. Retrieved September 1, 2014 from www.sciencedaily.com/releases/2012/06/120628164438.htm
National Institute for Physiological Sciences. "'Blindsight' used in everyday life scenes: Subjects with visual impairment turn eyes to motion, brightness, and color." ScienceDaily. www.sciencedaily.com/releases/2012/06/120628164438.htm (accessed September 1, 2014).

Share This




More Health & Medicine News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Liberia Continues Fight Against Ebola

Liberia Continues Fight Against Ebola

AFP (Aug. 30, 2014) Authorities in Liberia try to stem the spread of the Ebola epidemic by raising awareness and setting up sanitation units for people to wash their hands. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
California Passes 'yes-Means-Yes' Campus Sexual Assault Bill

California Passes 'yes-Means-Yes' Campus Sexual Assault Bill

Reuters - US Online Video (Aug. 30, 2014) California lawmakers pass a bill requiring universities to adopt "affirmative consent" language in their definitions of consensual sex, part of a nationwide drive to curb sexual assault on campuses. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
New Drug Could Reduce Cardiovascular Deaths

New Drug Could Reduce Cardiovascular Deaths

Newsy (Aug. 30, 2014) The new drug from Novartis could reduce cardiovascular deaths by 20 percent compared to other similar drugs. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins