Tonight will be Mostly Clear with a low of 41. Tomorrow will start with sunshine but a cold front will bring isolated showers to the area, after a high near 60.
What is the thick column of nerve tissue that links the brain to the peripheral nervous system? The Spinal Cord is the thick column of nerve tissue that links the  brain to most of the nerves. Making the world better, one answer at a time.
The L4 nerve is located in the lower back. Photo Credit Comstock Images/Comstock/Getty Images. Your spinal cord is the long bundle of nervous tissue and bones that relay messages between your brain and body. Nearly all muscular movement in the body is facilitated by these messages carried by the nerve cells. A severe injury to the spinal cord can therefore greatly hamper movement or prevent it altogether. In the lower body, it may prevent walking, swimming and all other types of movements performed with the legs.