Depression continues to threaten humanity across the globe, with nearly half of the suicidal cases involving depressed individuals. The number of people having depressive episodes at least once a day continues to rise significantly, with the American adult population leading the pack.
The spinal cord is the most important structure between the body and the brain. It is a vital link between the brain and the body, and from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter. Two consecutive rows of nerve roots emerge on each of its sides. These nerve roots join distally to form 31 pairs of spinal nerves. The spinal cord is a cylindrical structure of nervous tissue composed of white and gray matter, is uniformly organized and is divided into four regions: cervical (C), thoracic (T), lumbar (L) and sacral (S), each of which is comprised of several segments. The spinal nerve contains motor and sensory nerve fibers to and from all parts of the body.