Our brain is connected to the rest of our body through countless blood vessels, however unlike other organs and regions of the body not everything that is in the blood, can actually get into the brain, and visa versa. This is called the blood brain barrier. Often people mistake it with the meninges, although the meninges are chemically connected to the rest of the body and medication can freely pass it. The blood brain barrier exists because many of the molecules used in our body for signalling processes between tissues are the same molecules used in the brain for signalling. … Continue reading →