1, horizontal plane: a plane crossing the body and parallel to the ground, also called transverse plane.

2. Coronal plane: the section perpendicular to the ground along the left and right diameters of the body.

3. Sagittal plane: a plane perpendicular to the ground along the anterior and posterior diameter of the body, in which the plane passing through the midline becomes the median plane.

Extended data

1, external rotation: it is a rotational movement that occurs in the direction away from the midline of the body on the cross section.

2, retraction: it is the movement of the scapula in the direction of the spine. For example, in the backward bending posture, the shoulder blades need to be retracted to open the chest.

3. Protrusion: It is the movement of the scapula backward away from the spine. For example, the movement of the scapula when holding the chest with both arms in the eagle pose.

4. Depression: It is the movement of the scapula in the direction of the spine. Most yoga poses require us to relax our shoulders and feel the downward movement of the scapula along the spine.

5, lateral flexion: it is a movement that occurs on both sides of the trunk. For example, when the wind blows a tree, the left and right sides of the trunk stretch.