: the fact or status of being a citizen of a particular place. : the qualities that a person is expected to have as a responsible member of a community. the fact or status of being a citizen of a particular place. : the qualities that a person is expected to have as a responsible member of a community.
What is thoracic outlet syndrome (TOS)? Thoracic outlet syndrome (TOS) is a condition caused by compression of nerves or blood vessels in the thoracic outlet, the area between the base of the neck and the armpit, including the front of the shoulders and chest. There are three types of TOS: Vascular. This can be a compression of the artery and vein.
Pain and other symptoms occur when the nerves or blood vessels in this area are compressed. The likelihood of blood vessels or nerves in the thoracic outlet being compressed increases with increased size of body tissues in this area or with decreased size of the thoracic outlet.horacic outlet syndrome. n. Compression of the brachial plexus and subclavian artery by attached muscles in the region of the first rib and the clavicle, characterized by pain in the arm, numbness in the fingers, and weakness in the hand muscles.