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The superior thoracic aperture is essentially a hole surrounded by a bony ring, through which several vital structures pass. It is bounded by: the first thoracic vertebra (T1) posteriorly; the first pair of ribs laterally, forming lateral C-shaped curves posterior to anterior; and the costal cartilage of the first rib and the superior border of the manubrium anteriorly.
There are two openings of the thoracic cavity, a superior thoracic aperture known as the thoracic inlet and a lower inferior thoracic aperture known as the thoracic outlet. The thoracic cavity includes the tendons as well as the cardiovascular system which could be damaged from injury to the back, spine or the neck.
Thoracic outlet syndrome (TOS) is a condition in which there is compression of the nerves, arteries, or veins in the superior thoracic aperture, the passageway from the lower neck to the armpit, also known as the thoracic outlet. [1] There are three main types: neurogenic, venous, and arterial. [1]
Thoracic cage Thoracic cavity; Superior thoracic aperture (thoracic inlet) Inferior thoracic aperture; Intercostal space; Infrasternal angle; Bones of upper limb Pectoral girdle. Scapula. Acromion; Superior border Suprascapular notch; Glenoid cavity; Supraglenoid tubercle; Infraglenoid tubercle; Coracoid process; Clavicle. Acromial end
The mediastinum (from Medieval Latin: mediastinus, lit. 'midway'; [2] pl.: mediastina) is the central compartment of the thoracic cavity.Surrounded by loose connective tissue, it is a region that contains vital organs and structures within the thorax, namely the heart and its vessels, the esophagus, the trachea, the vagus, phrenic and cardiac nerves, the thoracic duct, the thymus and the lymph ...
The diaphragm is an upward curved, c-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. [6] The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity. [7]
The sternal angle is used in the definition of the thoracic plane. [citation needed] The angle also marks the level of a number of features: Boundary between the superior and inferior portion of the mediastinum [citation needed] Passage of the thoracic duct from right to left behind esophagus [citation needed] Tracheal bifurcation.
It is an extension of the endothoracic fascia that exists between the parietal pleura and the thoracic cage. Sibson muscular part is originated from scalenus medius muscle. Fascial part is originated from Endothoracic Fascia. It attaches to the internal border of the first rib and the transverse processes of vertebra C7.