Chiropractic care is known for its use of the adjustment, sometimes called manipulation. An adjustment is a precise procedure in which the trained Doctor of Chiropractic exerts specific corrective pressure at specific places on the spine or other joints. When a thorough examination reveals joints that are not in proper function, adjustments are applied to correct joint alignment and mobility, relieve associated muscle and nerve tension, improve balance and assist healing. In most cases, adjustments are performed manually or with a handheld instrument such as an Activator.