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The transversus thoracis muscle is innervated by one of the intercostal nerves and superiorly attaches at the posterior surface of the lower sternum. Its inferior attachment is the internal surface of costal cartilages two through six and works to depress the ribs.
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.
Cadaveric studies showed that the sternalis muscle has a mean prevalence of around 7.8% in the population, [7] with a slightly higher incidence in females. [1] The prevalence ranges from 0.5% to 23.5%, depending on the subpopulation [8] — it has been proposed that the possible reason for the sizable range could be the fact of the existence of small, ill-defined, or tendinous fibres which ...
The pectoralis major (from Latin pectus 'breast') is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast. Beneath the pectoralis major is the pectoralis minor muscle.
During chest compressions in cardiopulmonary resuscitation (CPR), it is possible to fracture or dislodge the xiphoid process, potentially leading to punctures or lacerations of the diaphragm. Furthermore, inadvertent liver puncture resulting in life-threatening internal bleeding can occur.
The internal intercostal muscles (intercostales interni) are a group of skeletal muscles located between the ribs.They are eleven in number on either side. They commence anteriorly at the sternum, in the intercostal spaces between the cartilages of the true ribs, and at the anterior extremities of the cartilages of the false ribs, and extend backward as far as the angles of the ribs, hence ...
This is the site of the sternoclavicular joint, between the sternum and clavicle. The first ribs also attach to the manubrium. [10] The transversus thoracis muscle is innervated by one of the intercostal nerves and superiorly attaches at the posterior surface of the lower sternum. Its inferior attachment is the internal surface of costal ...
The transversus thoracis muscle (/ t r æ n z ˈ v ɜːr s ə s θ ə ˈ r eɪ s ɪ s /), also known as triangularis sterni, lies internal to the thoracic cage, anteriorly.It is usually a thin plane of muscular and tendinous fibers, however on athletic individuals it can be a thick 'slab of meat', situated upon the inner surface of the front wall of the chest.