Adjustments, also known as manipulations in the chiropractic field is a simple, minor movement of the spine's vertebrae. The primary purpose of this movement is to realign vertebrae that have one way or another been moved out of place for reasons ranging from daily life to trauma to the skeletal system. Out of place, vertebrae lead to a ripple effect that impacts larger body systems such as the muscular system and the central nervous system. Improper alignment and damage to the flow of systems in the brain down to the body can cause people to function at less than their best. Most adjustments are pressure from the chiropractor using their hands to move a vertebrae into place, though some adjustments call for specialized tools. This is typically quick and painless. Sometimes people hear noises that resemble knuckles being cracked, known as joint cavitation. This is actually the release of gases such as oxygen and nitrogen coming out of the vertebrae joint. Overall, adjustments are a pretty good way to keep the body function at its maximum level. With a body in alignment, it can perform and respond to stimuli as it was designed to do.