: 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.
Neurogenic (neurological) thoracic outlet syndrome. This form of thoracic outlet syndrome is characterized by compression of the brachial plexus. The brachial plexus is a network of nerves that come from your spinal cord and control muscle movements and sensation in your shoulder, arm and hand.