Tags: Anatomical Structure.
The (transverse) thoracic plane or transthoracic plane is a geometric plane used to divide the mediastinum (the middle section of the chest cavity) into the superior mediastinum and the inferior mediastinum.The thoracic plane runs through the level of the sternal angle (the joint between the manubrium and body of the sternum) and between the intervertebral disc located between the T4 and T5 thoracic vertebrae.The superior mediastinum extends superiorly above the plane while the inferior mediastinum extends inferiorly.
