Two vascular compartments: have the common carotid artery, interior jugular vein and also the vagus nerve, on each side in the neck. If I want to confer with an entity that's defined as being the negation of A different entity by attaching "non-" it seems Peculiar to connect the "non-" https://www.theorthopaedicandpainpractice.com/treatment-for-neck-pain-headaches/