Brain knows how to integrate natural, artificial vision | WeForNews | Latest News, Blogs Brain knows how to integrate natural, artificial vision – WeForNews | Latest News, Blogs
Connect with us

Health

Brain knows how to integrate natural, artificial vision

Published

on

Brain.

Tel Aviv: Raising hope of effective treatment for age-related macular degeneration (AMD), researchers have found that the brain knows how to integrate natural and artificial vision, while maintaining information processing that is important for vision.

AMD is a common cause of severe vision loss in among those aged 50 and over.

Though there is no cure for AMD, significant recent advancements in artificial retina implants may lead to effective treatment.

“These pioneering results have implications for better restoration of sight in AMD patients implanted with retinal prosthetic devices and support our hypothesis that prosthetic and natural vision can be integrated in the brain,” said the study’s lead author Yossi Mandel from Bar-Ilan University in Israel.

“The results could also have implications for future brain-machine interface applications where artificial and natural processes co-exist,” said Mandel.

Located inside the eye the retina contains light receptors (photoreceptors) which absorb light. Information is then processed and transmitted to the brain.

The macula, the central area of the retina, processes most of the information that reaches the brain from the eye, enabling one to see while reading and driving, facial recognition, and any other activity that requires accurate vision.

In the peripheral retina, the area of the retina outside the macula that assists mainly with spatial judgment, vision is 10-20 times less precise.

In AMD precise vision is impaired due to damage to the centre of the retina, while peripheral vision remains normal.

When there is damage to the photoreceptor layers in the retina, an artificial retina — a device built from tiny electrodes smaller in width than a hair — may be implanted.

Activating these electrodes results in electrical stimulation of the remaining retinal cells and results in visual restoration, albeit partially.

AMD patients implanted with an artificial retina possess a combination of artificial central vision and normal peripheral vision.

“We used a unique projection system which stimulated either natural vision, artificial vision or a combination of natural and artificial vision, while simultaneously recording the cortical responses in rodents implanted with a subretinal implant,” said Tamar Arens-Arad from Bar-Ilan University.

The implant is composed of dozens of tiny solar cells and electrodes, developed by Professor Daniel Palanker at Stanford University in the US.


Health

Researchers develop coronavirus vaccine candidate

The next stage is to produce this on a larger scale needed for additional testing, to determine its effectiveness against the virus.

Published

on

By

coronavirus test

Sydney, Feb 22 : A team of researchers at the University of Queensland in Australia has created their first vaccine candidate in the laboratory for the novel coronavirus, COVID-19.

The team will move immediately into further development before formal pre-clinical testing, the university said on Friday.

The proof-of-concept milestone comes in less than a month after the project’s announcement on January 24 as part of the Coalition for Epidemic Preparedness Innovations (CEPI) rapid response programme.

“There is still extensive testing to ensure that the vaccine candidate is safe and creates an effective immune response, but the technology and the dedication of these researchers means the first hurdle has been passed,” said University of Queensland Vice-Chancellor and President Peter Hoj AC.

The work in the lab shows the feasibility of using the university’s “molecular clamp” technology to engineer a vaccine candidate that could be more readily recognised by the immune system, triggering a protective immune response.

The next stage is to produce this on a larger scale needed for additional testing, to determine its effectiveness against the virus.

Researchers said the early research had gone “as expected” and the material created had the properties which allowed the team to proceed with vaccine development.

Continue Reading

Health

Novel predicted coronavirus 40 years ago, Internet stumped

As the post went viral, Twitterati flooded the social media with their reactions.

Published

on

By

Japan China Pneumonia

New Delhi, Feb 17: An excerpt of the Novel “The Eyes of Darkness”, a 1981 thriller by bestselling suspense author Dean Koontz is revolving around the social media which tells of a Chinese military lab that creates a virus as part of its biological weapons programme.

In chapter 39 of his book, Koontz writes that the lab is located in Wuhan, which lends the virus its name, Wuhan-400.

Congress leader Manish Tewari has also tweeted excerpts from a book that went viral on the Internet that the coronavirus involved in the outbreak in China’s Wuhan appears to be man-made.

“Is Coranavirus a biological Weapon developed by the Chinese called Wuhan -400? This book was published in 1981. Do read the excerpt,” Congress leader Manish Tewari tweeted.

Tewari highlighted a paragraph that read: “They call the stuff ‘Wuhan-400’ because it was developed at their RDNA labs outside of the city of Wuhan, and it was the four hundredth viable strain of man-made micro-organisms created at that centre.”

As the post went viral, Twitterati flooded the social media with their reactions.

A user wrote, “Haha Infinite monkey theorem. Pick any event and chances are that some book written at some would have a similar plot . Conspiracy theory has no end.”

Another wrote, “Sensational … No doubt China had replaced Russia and USSR as rogue country in Hollywood films and later James Bond movies.”

A post read, “Intriguing for sure, hope the truth comes out.”

A user remarked, “Okay if it is then it surely backfired on them!”

By the end of Sunday, a total of 1,770 people had died of the disease and 70,548 confirmed cases of novel coronavirus infection had been reported in 31 provincial-level regions and the Xinjiang Production and Construction Corps in China.

Continue Reading

Health

WHO underestimates coronavirus’ ability to spread: Study

The World Health Organization estimates that the coronavirus has a transmissibility, expressed as a reproduction number, of between 1.4 and 2.5.

Published

on

Coronavirus

London, Feb 15 : The novel coronavirus may have greater ability to spread than the World Health Organization (WHO) has estimated so far, according to a review of previous studies of the virus’ transmissibility.

“Our review shows that the coronavirus is at least as transmissible as the SARS virus. And that says a great deal about the seriousness of the situation,” said Joacim Rocklov, Professor of Sustainable Health at Umea University in Sweden and one of the authors of the study, published in the Journal of Travel Medicine.

The World Health Organization estimates that the coronavirus has a transmissibility, expressed as a reproduction number, of between 1.4 and 2.5.

A reproduction number is a measurement of how many people a contaminated person transmits the virus to in a previously healthy population.

The higher the number, the more transferable the virus is and the higher the risk of its rapid spread.

When the reproduction number falls below 1.0, the epidemic is likely to die out.

Researchers in Umea in Sweden, Heidelberg in Germany and Zhangzhou in China have carried out a review of several scientific studies of the novel coronavirus.

In total, the researchers found twelve studies of sufficiently high quality.

The studies consisted of estimations of the growth rate based upon the cases observed in the Chinese population, and based upon statistical and mathematical methods.

The earliest studies of the coronavirus indicated a relatively low transmissibility. Thereafter, the transmissibility rose rapidly to stabilise between 2-3 in the most recent studies.

The reproduction number in the studies summed up to a mean of 3.28, and a median of 2.79, which is significantly higher than the World Health Organization’s estimation of 1.4-2.5.

“When looking at the development of the corona epidemic, reality seems to correspond well to or even exceed the highest epidemic growth in our calculations. Despite all intervention and control activities, the coronavirus has already spread to a significantly higher extent than SARS did,” said Rocklov.

The overall death toll in China due to the deadly coronavirus on Saturday increased to 1,523, with a total of 66,492 confirmed cases, authorities said.

Continue Reading
Advertisement

Most Popular