Planes, axes, and localisations in the human head The figure shows three axes annotated as follows: d: Dorsoventral or Axial axis (yellow) l: Left-right, or lateral axis (cyan, blue-green) m: Medial or anterior-posterior axis (magenta) The figure shows three major planes annotated as follows: a: Axial or horizontal plane (blue), that contains the lateral axis and also the medial axis c: Coronal plane (green), containing the axial axis and the lateral axis s: Sagittal plane (red), containing the axial axis and the medial axis There also is: p: an example of a parasagittal plane (yellow); parasagittal planes comprise the class of planes parallel to (and therefore lateral to) the sagittal plane. .