Fissure filling is a treatment that improves the apparent clarity of a gemstone by removing air and replacing it with a substance that has a refractive index similar to the host material. Many different substances may be used to fill fissures: oils, resins, waxes, glass, and various polymers, to name a few.
Cerebral autoregulation is a process in mammals, which aims to maintain adequate and stable cerebral blood flow.hile most systems of the body show some degree of autoregulation, the brain is very sensitive to over-and underperfusion. Cerebral autoregulation plays an important role in maintaining an appropriate blood flow to that region.
Importance of timing. These structural and functional changes do not all take place along one uniform timetable, and the differences in their timing raise two important points relevant to the use of neuroscience to guide public policy. First, there is no simple answer to the question of when an adolescent brain becomes an adult brain.