And what Aramidoula actually does is it controls things like breathing, it controls our ventilation rate, our respiratory rate, it controls our heart rate as well as blood pressure and other automatic or involuntary motion. For example, it controls vomiting. So we have the forebrain, we have the mid brain and we have the hind brain. Now let's discuss our spinal cord. Now, the spinal cord basically is found below the medulla and extends all the way down our body into the lower back of our body. So if we take the cross sectional view of our spinal cord we get the following diagram and notice just like the brain consists of white and gray matter our spinal cord also consists of white and gray matter.