As used in this chapter, unless the context otherwise requires:

       1.      “Board” means the state board of medical examiners.

       2.      “Pain” means acute pain and chronic pain. Acute pain is the normal, predicted physiological response to a noxious chemical or thermal or mechanical stimulus and typically is associated with invasive procedures, trauma, or disease, and is generally time-limited. Chronic pain is a state that persists beyond the usual course of an acute disease or healing of an injury or that may or may not be associated with an acute or chronic pathologic process that causes continuous or intermittent pain over months or years.

       3.      “Physician” means a physician licensed by the board.