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.
The jumping spider family (Salticidae) contains more than 500 described genera and about 5,000 described species, making it the largest family of spiders with about 13% of all species.Jumping spiders have some of the best vision among arthropods and use it in courtship, hunting, and navigation.Although they normally move unobtrusively and fairly slowly, most species are capable of very agile jumps, notably when hunting, but sometimes in response to sudden threats or crossing long gaps.hen a jumping spider is moving from place to place, and especially just before it jumps, it tethers a filament of silk (or 'dragline') to whatever it is standing on to protect itself if the jump should fail.