Measure: To estimate the cranial capacity of each skull in the Gizmo, measure the area of the part of the cranium that houses the brain. This part of the cranium is roughly behind the red line in the diagram at right.
Chemical dyes are sometimes injected into patients prior to an MRI (magnetic resonance imaging) to enhance internal images. However, certain widely used MRI dyes may cause a number of side effects, including a serious, potentially fatal disease known as nephrogenic systemic fibrosis, or NSF.
What is MRI? MRI stands for magnetic resonance imaging, and it is a kind of scan that can produce detailed pictures of parts of the body, including the brain. It can also be used to show which areas of the brain are working in different activities (e.g. when doing sums) by seeing where the brain is directing most of the blood, since the blood is