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.
Many swimming pool owners in Australia find funnel-web spiders in their pools at some point. These spiders cannot jump or live in the bottom of a pool for very long, but they can be deadly to people. Chlorine in the pool water eventually kills them after several hours of swimming around underwater. Air bubbles stick to their leg hairs, which helps them breathe for awhile.