The nervous system controls every function in your body. The nervous system consists of the brain, spinal cord, and nerves...which are branches off the spinal cord.
The bones of the skull and spine house and protect the brain and spinal cord. The spine is cut up into 24 movable segments called vertebrae. The nerves exit from in between the vertebrae and connect to all your body parts.
The brain generates an electro-chemical energy that travels down the spinal cord and out over the nerves, which is the power supply for all your cells.
When your spine is in it's proper alignment everything described above works to perfection and we are healthy. When the spine is out of alignment, nerves can become pinched, irritated, or inflamed, altering the signal from the brain, which can lead to malfunction, sickness, disease, and pain. The term for this condition is called a Vertebral Subluxation, which is what chiropractors treat.
Vertebral subluxations can also be silent...which is why it's a good idea to be checked periodically before symptoms develop.
Chiropractors treat subluxations a variety of different ways...most use their hands. I use my hands, a special table, and a spinal decompression machine if needed (primarily for disc bulges and herniations). The objective is to remove nerve interference from vertebral subluxations. Subluxations can lead to herniated discs and advanced spinal disc degeneration...so it's best to treat them early and often once detected.