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The inner surface of the sternum is also the attachment of the sternopericardial ligaments. [2] Its top is also connected to the sternocleidomastoid muscle. The sternum consists of three main parts, listed from the top: Manubrium; Body (gladiolus) Xiphoid process; In its natural position, the sternum is angled obliquely, downward and forward.
The injury is characterized by sudden and acute pain in the chest wall and shoulder area, bruising and loss of strength of the muscle. High grade partial or full thickness tears warrant surgical repair as the preferred treatment if function is to be preserved, particularly in the athletic population.
The triangles of the neck describe the divisions created by the major muscles in the region.. The side of the neck presents a somewhat quadrilateral outline, limited, above, by the lower border of the body of the mandible, and an imaginary line extending from the angle of the mandible to the mastoid process; below, by the upper border of the clavicle; in front, by the middle line of the neck ...
The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. [4] It travels obliquely across the side of the neck and inserts at the mastoid process of the temporal bone of the skull by a thin aponeurosis.
Its origin and insertion are variable. The sternalis muscle often originates from the upper part of the sternum and can display varying insertions such as the pectoral fascia, lower ribs, costal cartilages, rectus sheath, aponeurosis of the abdominal external oblique muscle. [1] [2] [3] It may be present unilaterally or bilaterally. [4]
The sternalis muscle is an anatomical variation that lies in front of the sternal end of the pectoralis major runs along the anterior aspect of the body of the sternum. The sternalis muscle often originates from the upper part of the sternum and can display varying insertions such as the pectoral fascia, lower ribs, costal cartilages, rectus ...
The thoracic cavity (or chest cavity) is the chamber of the body of vertebrates that is protected by the thoracic wall (rib cage and associated skin, muscle, and fascia). The central compartment of the thoracic cavity is the mediastinum .
These nerve groups transmit afferent (sensory) information from the scalp, neck, and shoulders to the brain. The motor branches of spinal nerves include: ansa cervicalis, dividing into a superior root, C-1, and an inferior root, C-2 and C-3, and the phrenic nerve, C-3 to C-5, the segmental nerve branches, C-1 to C-5.