#Daniel Palanker

[adjose]

Descubrieron un microchip para ciegos que podría devolverles la vista

Descubrieron un microchip para ciegos que podría devolverles la vista

Solo quienes viven en la oscuridad tras conocer la luz saben realmente lo que supone la ceguera. Pensando en este tipo de pacientes, algunos investigadores se han centrado en buscar soluciones alternativas aprovechando la moderna tecnología. Y fruto de ello, surgió un microchip para ciegos, que podría devolverles la esperanza de volver a ver.

Consiste en un increíble mecanismo microscópico de…

[innonurse]

A mix of natural and computer vision could better treat blindness

- By InnoNurse Staff -

Macular degeneration (AMD) causes blindness in millions of people around the globe. It is the most common cause of significant vision loss in the Western world among those aged 50 and over, and its occurrence increases with age. There is no cure for AMD, yet significant recent advancements in artificial retina implants may lead to effective treatment.

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 center 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. This combination of artificial and natural vision is important to study in order to understand how to help the blind. One of the critical questions in this regard is whether the brain can integrate artificial and natural vision properly.

In a new study published in the journal Current Biology, researchers from Bar-Ilan University and Stanford University report for the first time the discovery of evidence indicating that the brain knows how to integrate natural and artificial vision, while maintaining processing information that is important for 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, who conducted the experiments as part of her doctoral studies. The implant is composed of dozens of tiny solar cells and electrodes, developed by Prof. Daniel Palanker at Stanford University.

"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. The results could also have implications for future brain-machine interface applications where artificial and natural processes co-exist," said Prof. Yossi Mandel, Head of Bar-Ilan University's Ophthalmic Science and Engineering Lab and the study's lead author.

The research was carried out in Prof. Mandel's lab at the School of Optometry and Vision Science, Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials (BINA) at Bar-Ilan University's, in collaboration with Prof. Palanker of Stanford University. The study was conducted by Tamar Arens-Arad in collaboration with Dr. Nairouz Farah, Rivkah Lender, Avital Moshkovitz and Thomas Flores.

Source: Bar-Ilan University

Read Also

The Futurism of Sight

[tastydregs]

Scientists Let Blind “See” With Next-Gen Bionic Glasses

This summer, scientists used camera-mounted glasses and arrays of electrodes to send visual data directly into the brains of blind patients. A company called Second Sight makes a similar implant that it claims is being used by 350 patients around the world. But those experiments have failed to provide patients with anything like regular vision.

“None of the patients gave up their white cane or guide dog,” visual prostheses expert from Stanford University Daniel Palanker told Science. “It’s a very low bar.”

But now, researchers are working on a new generation of devices that they say could give the blind much of their vision back.

Palanker and his team created a retinal implant with 400 photodiodes — think of them as “pixels” — that gave participants who had the device implanted a year ago the ability to recognize objects on a table and read letters on a screen, according to Science.

Palanter and his team presented videos of their findings at the annual meeting of the Society for Neuroscience in Chicago last week.

The new device won’t work on patients who have lost vision due to injury or damage to the optic nerve. It’ll work only on patients who still have most of the pathways that enable sight intact — except for their photoreceptors.

Photoreceptors are only the first step in the long sensory pathway as visual information gets transmitted from the eye to the brain. The photoreceptors are responsible for sending signals to special cells in the back of the eye, which then relay that information via the optic nerve to the brain.

Many common disorders, including macular degeneration and retinal detachment, cause the destruction of the photoreceptors, but leave the rest of the sensory pathway in tact. Devices like Palanter’s make use of this remaining sensory pathway.

If much more than just patient’s photoreceptors have been destroyed, workarounds are necessary. Second Sight’s device, for instance, involves implanting 60 electrodes directly onto the visual cortex — the last step in the relay of information before the brain. These electrodes then relays signals to the brain that are collected by a camera that’s mounted onto a pair of glasses.

The results of this are expectedly less impressive than Palanker’s device. After having the device implanted for about one year, they could only locate a fist-sized white square on a black screen, Science reports.

And then there are the risks associated with implanting electrodes directly onto the visual cortex, like Second Sight’s. Too much stimulation could risk triggering a seizure, according to Science. If the electrodes are too close together, visual points could fuse together into a blob. Others have raised concerns over the wires causing scarring.

Such systems could end up “ruining the cortex for all other implants in the future and at best, [the patient is] not going to see much,” State University of New York neuroscientist Stephen Macknik told Science.

The post Scientists Let Blind “See” With Next-Gen Bionic Glasses appeared first on Futurism.

[louisepalanker]

As you settle in for 60 Stormy Minutes tonight, enjoy your new favorite podcast, Things I Found Online starring Voice Over great Joe Cipriano, and Premiere Radio Founder (that would be me) Louise Palanker as we mine the giant brain of Inside Edition's Jim Moret who sat in stoney silence with Stormy Daniels before she was finally ready to admit that he is pretty. https://apple.co/2G40i2T

[imperarenox]

Pixium Vision to host KOL Meeting on March 5, 2019 in Paris

Daniel Palanker, PhD, Professor, Department of Ophthalmology, School of Medicine, and Director Hansen Experimental Physics Laboratory, Stanford ...

[deadbred]

Pixium Vision to host KOL Meeting on March 5, 2019 in Paris

Daniel Palanker, PhD, Professor, Department of Ophthalmology, School of Medicine, and Director Hansen Experimental Physics Laboratory, Stanford ...

[mrsdianabarnes]

Pixium Vision to host KOL Meeting on March 5, 2019 in Paris

Daniel Palanker, PhD, Professor, Department of Ophthalmology, School of Medicine, and Director Hansen Experimental Physics Laboratory, Stanford ...

[chefbailarin]

Pixium Vision to host KOL Meeting on March 5, 2019 in Paris

Daniel Palanker, PhD, Professor, Department of Ophthalmology, School of Medicine, and Director Hansen Experimental Physics Laboratory, Stanford ...

[ms-gold]

Pixium Vision to host KOL Meeting on March 5, 2019 in Paris

Daniel Palanker, PhD, Professor, Department of Ophthalmology, School of Medicine, and Director Hansen Experimental Physics Laboratory, Stanford ...

[supportivy]

Regarder les cellules du cerveau se déclencher, avec une torsion d'ondes gravitationnelles

Regarder les cellules du cerveau se déclencher, avec une torsion d'ondes gravitationnelles Des chercheurs dirigés par Daniel Palanker ont découvert qu'une technique d'imagerie appelée interférométrie pourrait être utilisée pour surveiller le comportement des neurones.

Par Nathan Collins

Les neuroscientifiques disposent de nombreux moyens pour suivre l'activité cérébrale au niveau des neurones…

[vickiabelson]

I've been sitting on this since Mars went up Uranus or some shit... and boy is my ass sore. Revamping The Road Taken ("Is it, The Road Not Taken, The Road Less Traveled?!?) to Game Changers. Feels right, feels good, feels like a change for the better. Thrilled to be traversing the new with wingman Jason Reid, new logos by graphic design genius, Lauren Martinez, and new banners by the always brilliant D.j. Markuson. 

Grateful as fuck for the wisdom and support of Anson Williams, Rick Smolke, Zoe Moon, Jeremy Stevens, Marc Pariser, Mike Daniels, Craig Ames, Abby Cohen, Pete George, Nicole Venables, and, the road traveled with the spectacular Louise Palanker. Thanks to Mike Zinna and Cyrus Webb, who opened the doors which got me here. It takes a large city and the surrounding metropolitan area. 

See you Wednesday, same bat place, same bat time. 

Whew! What a relief, I suck at secrets.

Game Changers with Vicki Abelson 

Wednesdays, 7pm PT/ 10pm ET

Live on the Facebook 

http://bit.ly/2y47ZCi

Also on iTunes, SoundCloud, Stitcher, and tunein

[louisepalanker]

Jim Moret & Stormy Scandals

Direct from the eye of the Stormy Daniels scandal, Inside Edition’s Jim Moret joins Joe Cipriano and Louise Palanker to talk about Stormy vs. the law, medical mysteries, his groundbreaking George Michael coming out interview, depression, Dr. Phil, life lessons and the challenges of being the son of his dreamy, heartthrob father, James Darren.

Check out this episode!

[mateobishop]

Laser Cataract Surgery More Accurate Than Manual

Laser Cataract Surgery More Accurate Than Manual. Cataract surgery, already an exceedingly allowable and successful procedure, can be made more precise by combining a laser and three-dimensional imaging, a immature study suggests. Researchers found that a femtosecond laser, used for many years in LASIK surgery, can sign into delicate eye tissue more cleanly and accurately than manual cataract surgery, which is performed more than 1,5 million times each year in the United States kisah sex sabrina di entot alfi. In the undercurrent procedure, which has a 98 percent attainment rate, surgeons use a micro-blade to cut a circle around the cornea before extracting the cataract with an ultrasound machine. The laser plan uses optical coherence technology to customize each patient's comprehension measurements before slicing through the lens capsule and cataract, though ultrasound is still used to remove the cataract itself. "It takes some proficiency and energy to break the lens with the ultrasound," explained captain researcher Daniel Palanker, an associate professor of ophthalmology at Stanford University badane. "The laser helps to precipitateness this up and make it safer". After practicing the laser procedure on pig eyes and donated beneficent eyes, Palanker and his colleagues did further experiments to confirm that the high-powered, rapid-pulse laser would not cause retinal damage. Actual surgeries later performed on 50 patients between the ages of 55 and 80 showed that the laser digest circles in lens capsules 12 times more scrupulous than those achieved by the standard method treatment. No adverse effects were reported. The study, reported in the Nov 17, 2010 emanate of Science Translational Medicine, was funded by OpticaMedica Corp of Santa Clara, Calif, in which Palanker has an impartiality stake. The results are being reviewed by the US Food and Drug Administration, while the laser technology, which is being developed by several uncommunicative companies, is expected to be released worldwide in 2011. Dr Scott Greenstein, a extensive ophthalmology and cataracts expert at Massachusetts Eye and Ear Infirmary, said he was uneasy that the delving was funded by a company with a stake in the outcome. But he added that the data was encouraging. "I as for oneself am excited by it," said Greenstein, who teaches ophthalmology at Harvard Medical School. "It's an enhancement of something we're already doing that's completely successful. We constraint a number of centers studying this with more patients. It would be useful to see if there is a significant statistical difference in the outcomes". Both Greenstein and Dr Richard Bensinger, a Seattle ophthalmologist and spokesman for the American Academy of Ophthalmology, expressed task that the laser-guided cataract surgery would be much more high-priced than manual surgery and were skeptical that strength insurance companies would be willing to pick up the tab. "It's a fairly expensive way to do something we do rational now with a $120 instrument that makes the opening. It's beneficial to the extent that it can avoid a hasten in the cornea - but the downside is you need a very expensive machine to do it. It's at best a little courtliness that adds a little precision". Although the femtosecond laser technique is unquestionably more precise, Palanker's call that it results in a better fit for the artificial lens replacing the clouded one is dubious, Bensinger and Greenstein said. Experienced surgeons performing directions cataract surgery rarely have trouble aligning the brand-new lens with the pupil and keeping it in place. So "Over the thousands of cases I've done, I'm real not aware personally of this being a problem. If you have a less precise, experienced surgeon then this would be a benefit for the patient. It makes reproducible, authentic incisions every time". Palanker said further research will bring into focus on whether laser-guided cataract surgery results in better postoperative vision than traditional surgery neosize plus. Among the undersized group of study participants there was no significant difference in outcomes between the two.

[freesearchengines-blog]

Laser Cataract Surgery More Accurate Than Manual

Laser Cataract Surgery More Accurate Than Manual. Cataract surgery, already an extraordinarily shielded and successful procedure, can be made more precise by combining a laser and three-dimensional imaging, a further study suggests. Researchers found that a femtosecond laser, used for many years in LASIK surgery, can curtailment into delicate eye tissue more cleanly and accurately than manual cataract surgery, which is performed more than 1,5 million times each year in the United States growth hormone at rite aid. In the flow procedure, which has a 98 percent triumph rate, surgeons use a micro-blade to cut a circle around the cornea before extracting the cataract with an ultrasound machine. The laser wont uses optical coherence technology to customize each patient's optic measurements before slicing through the lens capsule and cataract, though ultrasound is still used to remove the cataract itself. "It takes some handiness and energy to break the lens with the ultrasound," explained advanced position researcher Daniel Palanker, an associate professor of ophthalmology at Stanford University noorclinic penis size. "The laser helps to promptness this up and make it safer". After practicing the laser procedure on pig eyes and donated sensitive eyes, Palanker and his colleagues did further experiments to confirm that the high-powered, rapid-pulse laser would not cause retinal damage. Actual surgeries later performed on 50 patients between the ages of 55 and 80 showed that the laser cut back circles in lens capsules 12 times more accurate than those achieved by the time-honoured method vigrax kuracja. No adverse effects were reported. The study, reported in the Nov 17, 2010 discharge of Science Translational Medicine, was funded by OpticaMedica Corp of Santa Clara, Calif, in which Palanker has an open-mindedness stake. The results are being reviewed by the US Food and Drug Administration, while the laser technology, which is being developed by several retired companies, is expected to be released worldwide in 2011. Dr Scott Greenstein, a sweeping ophthalmology and cataracts expert at Massachusetts Eye and Ear Infirmary, said he was uneasy that the examination was funded by a company with a stake in the outcome. But he added that the data was encouraging. "I from where one stands am excited by it," said Greenstein, who teaches ophthalmology at Harvard Medical School. "It's an enhancement of something we're already doing that's definitely successful. We shortage a number of centers studying this with more patients. It would be useful to see if there is a significant statistical difference in the outcomes". Both Greenstein and Dr Richard Bensinger, a Seattle ophthalmologist and spokesman for the American Academy of Ophthalmology, expressed disquiet that the laser-guided cataract surgery would be much more overpriced than manual surgery and were skeptical that trim insurance companies would be willing to pick up the tab. "It's a fairly expensive way to do something we do correctly now with a $120 instrument that makes the opening. It's beneficial to the extent that it can avoid a fly in the cornea - but the downside is you need a very expensive machine to do it. It's at best a little distillation that adds a little precision". Although the femtosecond laser technique is unquestionably more precise, Palanker's maintain that it results in a better fit for the artificial lens replacing the clouded one is dubious, Bensinger and Greenstein said. Experienced surgeons performing handbook cataract surgery rarely have trouble aligning the unfamiliar lens with the pupil and keeping it in place. So "Over the thousands of cases I've done, I'm honestly not aware personally of this being a problem. If you have a less precise, experienced surgeon then this would be a benefit for the patient. It makes reproducible, realized incisions every time". Palanker said further research will concentration on whether laser-guided cataract surgery results in better postoperative vision than traditional surgery noopept with phenibut. Among the diminutive group of study participants there was no significant difference in outcomes between the two.