Osteology of the Anterolateral Thoracic Wall

Flashcards covering the osteology of the anterolateral thoracic wall.

Liquefied

Process by which internal organs could potentially turn to liquid because of the intensity of a hit on the ice.

Thorax

Barrel-shaped cavity forming the upper portion of the torso.

Thoracic Inlet

Superior boundary between the neck and thorax at the level of the first ribs.

Thoracic Outlet

Inferior muscular boundary separating the thoracic and abdominal cavity, formed by the diaphragm.

Thoracic Outlet Syndrome

Medical condition that compresses the vessels passing in and out of the thoracic inlet.

Anterior Median (Midsternal) Line

Imaginary line signifying the intersection of the midsagittal plane with the sternum anteriorly.

Midclavicular Line

Imaginary line passing vertically through the midpoint of the clavicle.

Anterior Axillary Line

Imaginary line passing vertically through the anterior axillary fold made by the inferolateral border of the pectoralis major muscle.

Posterior Axillary Line

Imaginary line that lines up with the posterior axillary fold formed by the latissimus dorsi muscle.

True Ribs

Ribs with a direct costal attachment to the sternum.

False Ribs

Ribs whose costal cartilages fused together to create a single indirect attachment to the sternum.

Floating Ribs

Ribs that have no attachment to the sternum and remain suspended inside muscular sheaths.

Head of the Rib

Portion of the rib that articulates with the vertebrae at the level of the intervertebral disc.

Tubercle

Point of muscular attachment and articulation with the transverse process of the inferior vertebrae.

Costal Angle

Greatest amount of curvature along the body of the rib.

Costal Groove

Notch located at the deep inferior surface of each rib that accommodates the intercostal neurovascular bundle.

Intercostal Neurovascular Bundle

Intercostal vein, artery, and nerve.

Costal Cartilages

Projections of hyaline cartilage that fuse with the rib laterally and insert into the concave surfaces along the border of the sternum.

Costal Margin

Inferior border of fused costal cartilages

Manubrium

Upper bone of the sternum, also known as the sword handle.

Manubriosternal Joint

Synarthrotic joint where the manubrium articulates with the body of the sternum.

Sternal Angle

Palpable apex at the junction of the manubrium and body of the sternum, also known as the angle of Lewis.

Xiphoid Process

Tip of the sternum, easily palpable at the junction of the left and right costal margins.