A low hemoglobin count can also be due to blood loss, which can occur because of: 1  Bleeding from a wound. 2  Bleeding in your digestive tract, such as from ulcers, cancers or hemorrhoids. 3  Bleeding in your urinary tract.  Frequent blood 1  donation. Heavy menstrual bleeding.
The brain is the control centre for your body and it sits in your skull at the top of your spinal cord. The brain has three main parts. 1  The cerebellum (say se-re-bell-um). The brain stem, that controls a lot of the 'automatic' actions of your body such as breathing and heart beat, and links the brain to the spinal cord and the rest of the body.
The device is smaller than an almond. A surgeon implants it through your mouth's upper gumline and guides it up into the area of your head where the SPG is. A third type of neurostimulation for cluster headaches focuses on the occipital nerves, which are in the back of the head. In deep brain neurostimulation, a surgeon places a device in your hypothalamus, which is a part of your brain behind your eyes. Unlike the other methods, this is major surgery.