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[[Image:Axillary lines.png|thumb|Axillary lines.]] [[File:Brantigan 1963 1-51.png|thumb|Vertical lines: Midline, lateral sternal line, parasternal line and midclavicular line. Horizontal lines: Level of the sternal angle, and zipho-sternal line.]] Anatomical lines, or "reference lines," are theoretical lines drawn through anatomical structures and are used to describe anatomical location. The following reference lines are identified in ''Terminologia Anatomica'': * Anterior median line * Lateral sternal line: A vertical line corresponding to the lateral margin of the sternum. * Parasternal line: A vertical line equidistant from the sternal and mid-clavicular lines. * Mid-clavicular line: A vertical line passing through the midpoint of the clavicle. * Mammillary line * Anterior axillary line: A vertical line on the anterior torso marked by the anterior axillary fold. * Midaxillary line: A vertical line passing through the apex of the axilla. * Posterior axillary line: A vertical line passing through the posterior axillary fold. * Scapular line: A vertical line passing through the inferior angle of the scapula. * Paravertebral line: A vertical line corresponding to the tips of the transverse processes of the vertebrae. * Posterior median line
Other anatomical lines include: * Mid-pupillary line: A line running vertically down the face through the midpoint of the pupil when looking directly forward. * Mid-inguinal point: A point midway between the anterior superior iliac spine and the pubic symphysis. * Intercristal line: A transverse line passing across the lumbar spine between the superior aspects of the iliac crests. * Mid-dorsal line: The intersection between the dorsal skin and the median plane. * Mid-ventral line: The intersection between the ventral skin and the median plane.
==See also== * Axillary lines * Anatomical plane
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