Daily Archives: August 4, 2006
The spinal cord is the all-important switchbox that connects the brain with the body. It’s like a big bundle of wires entering a telephone company’s central office. All the nerves from parts of the body below the neck run to the spinal cord, which runs down the center of the backbone.
Three types of nerves run through the spinal cord. Motor nerves send commands from the brain to the body’s muscles. Sensory nerves take the reverse route, carrying information about pain, touch, heat, cold and related information from the body to the brain. The third kind comprises the Autonomic Nervous System, which controls involuntary internal movements such as the rate of heartbeat and movement in the digestive tract, and sexual function.