A new way of looking at stroke

Like a burning fire, the brain constantly needs oxygen, and when the blood vessel is blocked in a stroke, part of the brain lacks oxygen and nutrition. When this happens, the neurons in that part of the brain die, causing the body's function that those neurons serve to completely disappear.

Strokes are often associated with a major blockage of blood vessels that damages brain tissue, but small blood vessels can also be blocked with more frequent levels. Such small strokes cannot be seen outside when present, but medical studies show that these small strokes will make your cognitive ability decrease with age.

Very few studies have been done to investigate the effect of clogging small blood vessels on the function of nearby neurons.One problem is that it is very difficult to create small blood vessel blockages in the brains of lab animals.

Stroke is associated with blood clots that damage brain tissue.(Photo: vietbao.vn)

Cornell University graduate student John Nguyen and adviser Chris Schaffer developed a model to explore the impact of small strokes on rodent's brain. They used a non-linear laser canal to identify and clog blood vessels in rodents and then monitor the effect on blood flow in reverse capillaries in the brain. They found that blockage of blood vessels can significantly reduce blood flow in reverse capillaries, which can cause neurons to die slowly.

These findings suggest that small obstruction in blood vessels plays a certain role in cognitive impairment.Dead tissues are often found in the bodies of people with senile dehydration, and now researchers have a way to study this phenomenon.

Medical research is the foundation for the 2008 optical field (FiO); The 92nd Annual Meeting of the Optical Association (OSA), held October 19-23 at Riverside Convention Center, Rochester, NY Fio 2008 will take place in parallel with Science Lazer XXIV, conference annually of the Laser Science Department of the American Physical Society. Presentation of FTuE3.'Femtosecond Laser-Driven Photodisruption to Induce Single Venule Occlusions in Rodent Brain,' on October 21.