Watch A Surgical Robot Suture A Delicate Grape--And Pretend It’s Your Uterus. Clumsy-handed medical students often practice sutures on things like pig’s feet and banana peels. A robot surgeon in training? With tiny claws far more nimble than human fingers, it gets to practice sewing up the thin skin of a grape. That’s the impressive demo you can see in the video below. The robot—which is controlled by a surgeon not seen on the video—isn't only able to put the grape back together. At the end, you can see it was actually doing it from within a narrow-mouth glass bottle. What’s shown is a "wristed needle driver," one of the latest FDA-approved devices that’s a part of da Vinci Surgical Systems, a platform that has been used in operating rooms since the year 2000 to help make many kinds of surgeries less invasive. With the robots, surgeons can make smaller incisions and use video feeds to navigate inside the body.
In November, the Texas Institute of Robotic Surgery said it completed one of the first surgeries—a hysterectomy—using the newest instrument. Conversatorio Simposio Darwin la selección natural de conocimiento. Arte como construcción cerebral : Rodolfo Llinás. 1. Bases físicas de la conciencia- Rodolfo Llinás. Rodolfo Llinás, explain dreaming. Elisabeth Kübler-Ross. Elisabeth Kübler Ross (Zúrich, 8 de julio de 1926 - Scottsdale, Arizona, 24 de agosto de 2004) fue una psiquiatra y escritora suizo-estadounidense, una de las mayores expertas mundiales en la muerte, personas moribundas y los cuidados paliativos.
Asimismo fue pionera en el campo de investigación de las experiencias cercanas a la muerte, siendo actualmente reconocida como una figura de autoridad en la materia. Biografía[editar] Médica psiquiatra suiza, autora de On Death and Dying (1969), donde expone su conocido modelo de Kübler-Ross por primera vez. En esa y otras doce obras, sentó las bases de los modernos cuidados paliativos, cuyo objetivo es que el enfermo afronte la muerte con serenidad y hasta con alegría. Se licenció en medicina en la Universidad de Zúrich en 1957 y en 1958, se mudó a Nueva York, donde continuó sus investigaciones. Empezó como residente con pacientes a punto de morir y más tarde fue dando conferencias sobre el tratamiento de moribundos.
Obra[editar] So my mushy head is 'hardwired' for girly things, is it? If this is science, I am Richard Dawkins | Suzanne Moore. If you cut my head in half, out would spill sugar and spice and all things nice, obviously. The part of the brain that does parking would be small, but the part that organises cupcakes and friendship would fizz like sparkling rose. Because I am a girl whose mushy head is "hardwired" for girly things. As ever, when I see the latest stuff on gender differences in the brain, I feel that I am barely female. Some parts of my brain have gone rogue. What we are told is that neuroscience is actually a mass of disciplines: neurology, physiology, psychology, molecular biology and genetics, all of them ramped up by new ways of imaging the brain. My brain also lives in a female body and clearly there are differences between men and women. Neuroscience is just as useful as evolutionary biology when it comes to reinforcing stereotypes in a pop-psychology manner.
Now, though, neuroscience has achieved a quasi-religious status. How hormones change brain organisation has yet to be fully explained. 2 | These 5 Places Are Some Of The Most Irreplaceable In The World--And They're All At Risk. For the last 50 years, the International Union for the Conservation of Nature (IUCN) has kept the largest, most-relied-on database of all the threatened species in the world on its Red List.
The organization was the first to use the term "sustainable development," and has long lobbied industry and government to preserve the world's "natural capital. " But part of growing natural capital (and saving the animals) means keeping crucial places intact, too. In a paper published today in Science, the IUCN has outlined the top 78 most "irreplaceable" sites in the world that provide habitats to the majority of more than 600 bird, mammal, and amphibian species. "People have focused a lot on expanding the protected area network. We focused a lot on expanding and filling the gaps," Ana Rodrigues, a global researcher with the IUCN, said.
Part of the reason the IUCN decided to release the database was to highlight specific endangered species that are still at risk, even within "protected" areas. Gene Used In Embryogenesis Can Repair Adult Tissue. There are some amazing genes and cellular processes active during embryonic development that are never seen again later in life. Though some insects and amphibians are able to carry those traits into adulthood, mammals have a dramatic decrease in the ability to regenerate tissue after birth. A new study has shown that one embryonic protein can be used to help regenerate adult tissue in a living organism, not just in a dish.
Mice that had been genetically altered to produce Lin28a throughout life had outstanding regenerative power. Though regular mice typically stop producing new hair at around 10 weeks, those with a continued presence of Lin28a kept growing fur throughout their lives. Lin28a also boosted regeneration of limbs. Lin28a was also shown to promote prompt healing of damaged ears, increase metabolism, and contribute to cell proliferation and migration, which are necessary for tissue repair. Surprising variation among genomes of individual neurons from same brain. It was once thought that each cell in a person's body possesses the same DNA code and that the particular way the genome is read imparts cell function and defines the individual. For many cell types in our bodies, however, that is an oversimplification. Studies of neuronal genomes published in the past decade have turned up extra or missing chromosomes, or pieces of DNA that can copy and paste themselves throughout the genomes.
The only way to know for sure that neurons from the same person harbor unique DNA is by profiling the genomes of single cells instead of bulk cell populations, the latter of which produce an average. Now, using single-cell sequencing, Salk Institute researchers and their collaborators have shown that the genomic structures of individual neurons differ from each other even more than expected.
The findings were published November 1 in Science. The miniscule amount of DNA in a single cell has to be chemically amplified many times before it can be sequenced. 4 | These Photos Showcase The Wonders Of The World You Can't See. When we think of stunning photographs, we tend to picture landscapes on an epic scale. Equally awe-inspiring--and perhaps more difficult to shoot--is the incredibly small.
Since 1974, the Nikon Small World Photomicrography Competition has celebrated vistas that are only visible when magnified hundreds of times. This year's winner is Wim van Egmond, curator of the Micropolitan Museum. (The museum is wonderfully known as "The Institute for the Promotion of the Less than One Millimetre. ") Van Egmond took first place with a 250x magnification of Chaetoceros debilis, a marine plankton that forms a helical chain. Van Egmond collected the algae himself, using a plankton net and a fine meshed net.
He then shot a sample using a Nikon digital camera and an old Zeiss microscope. Van Egmond says he approaches his photographs like human portraits in order to capture each micro-organism's unique personality. IMBIOMED-L (medicina) revistas médicas.