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.
Dock spiders can swim. A dock spider can actually swim under water and stay submerged for several minutes. It uses air bubbles trapped in the fine hairs on its body under its belly to provide oxygen while it is under water â a bit like a dock spider scuba dive. Dock spiders walk on water.
Second: There are three types of spiders called Banana Spiders: Actually not all spiders are venomous as the camel spider's bite doesnt contain venom is an incorrect edit as camel spiders are not spiders at all and are in fact solifuges. The Western Pacific Banana Spider, which is most commonly found in tropical islands such as Okinawa and the Philipeins. 2  It is a moderately large orb weaver with a distinctive, yellow mottled abdomen and is highly venomous.