However , in most parts the fibers go in all directions , and thus although they constrain the diffusion the FA is 0 .
For example , the brain can be thought of as a fluid permeated by many fibers ( nerve axons ) .
In most parts the fibers go in all directions , and thus although fibers constrain the diffusion the FA is 0 .
For example , the brain can be thought of as a fluid permeated by many fibers ( nerve axons ) .