Chronic stress can occur in response to everday stressors that are ignored or poorly managed, as well as to exposure to traumatic events.
medial. [mÄâ²dÄÂ·Él]. Etymology: L, medius, middle. 1 pertaining to, situated in, or oriented toward the midline of the body. 2 pertaining to the tunica media, the middle layer of a blood vessel wall. Also mesial. adjective Toward the centre, middle, median, as of the body.
Boundaries. Superior mediastinum: 1  anteriorly: the sternum. 2  posteriorly: the upper thoracic vertebra. 3  inferiorly: an arbitrary plane passing horizontally and posteriorly from the manubriosternal joint to the junction of T4/T5 vertebrae. 4  superiorly: thoracic inlet. 5  laterally: apices of the lungs.