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.
Quick Answer. Diving bell spiders of the species Argyroneta aquatica have the ability to swim, and they use this adaptation to live underwater. Although they live and swim in the water, diving bell spiders still breathe air by creating air pockets underwater that they use as homes. Continue Reading.
Why do spiders spin webs? How do spiders create webs? How long does it take a spider to build a web? How strong is a spider web? Why is spider silk sticky? What else do spiders use silk for? Spider Bites. What is the most venomous spider in the world? How do I treat a spider bite? What do spider bites look like? Reproduction. When do spiders lay eggs? How do spiders reproduce? How many eggs do spiders lay?