31. The blade glints under high intensity lights before sinking cleanly into pulpy gray matter . 32. The amount of gray matter is a measure of the number of brain cells. 33. He believes the operation described in " Gray Matter " could be performed now. 34. White matter is shown in dark gray, gray matter is shown in light gray. 35. Trace amounts are what might be found in gray matter between Andrews and Tarpley. 36. He likened gray matter , which covers the brain, to computers scattered across the Internet. 37. In males, there was less gray matter volume in the left inferior parietal cortex. 38. Their cerebral cortex-the gray matter that contains these " intellectual " cells _ actually thickened. 39. Gray matter heterotopia are common malformations of cortical development.40. The casing is plastic, with a charcoal-gray matte texture.