The MRI scanner measures this signal difference and displays the activity as a colored area (Figure 1). Diffusion Tensor Imaging (DTI) is a technique that detects how water travels along the white matter tracts in the brain (Figure 2). White-matter tracts connect different parts of the brain and must be protected during surgery. A dye (contrast agent) may be injected into your blood stream.
His name is Brian. Dolomedes briangreenei, affectionately known as Brian, can surf, swim and catch fish. Next thing we know heâll be throwing a prawn on the barbie. A NEW species of spider which can surf, swim and catch fish has been discovered in Queensland. Australian researchers have named it Dolomedes briangreenei, or Brian for short, in honour of physicist and World Science Festival co-founder Brian Greene, who is professor of physics and mathematics at Columbia University.
One of the smallest and most venomous spiders in the world is the black widow spider. The venom in a black widow spider is 15 times more deadly than a rattlesnake, but luckily, the spider will only bite in self-defense. One of the largest dangerous spiders in the world is the Northern funnel web spider. It lives in Australia and can grow to be more than 3 inches long. It lives in trees, is attracted to water and can sometimes be found in swimming pools.