Buprenorphine, the active ingredient in both Suboxone and Subutex is less likely to cause addiction, and has a calmer withdrawal period. More clinical studies have been done on the effects of methadone during pregnancy than the effects of buprenorphine during pregnancy.
You won't believe these 10 facts about people. Gray matter or grey matter is a type of neural tissue which is found in the brain and spinal cord. It is named after its distinctive brownish-gray color, in contrast with white matter, another type of neural tissue which appears white because it is coated in myelin sheathes.
The substantia nigra is a third colored component found in the brain that appears darker due to higher levels of melanin in dopaminergic neurons than its nearby areas. Note that white matter can sometimes appear darker than grey matter on a microscope slide because of the type of stain used.