Serratus posterior superior muscle :- muscle details :- a thin, quadrilateral muscle, situated at the upper and back part of the thorax, deep to the rhomboid muscles. origin :- Nuchal ligament (or ligamentum nuchae) and the spinous processes of the vertebrae C7 through T3. Insertion :- The upper borders of… Continue reading
Serratus posterior inferior muscle :- muscle details :- a muscle of the human body. origin :- Vertebrae: Spinous processes of T11 – L2 . Insertion :- The inferior borders of the 9th through 12th ribs . Nerve :- Intercostal nerves T9 through T12 . Actions:- Depress the lower ribs 9-12,… Continue reading
Levatores costarum muscles :- Muscle details :- twelve in number on either side, are small tendinous and fleshy bundles, which arise from the ends of the transverse processes of the seventh cervical and upper eleven thoracic vertebrae . Origin :- Transverse processes of C7 to T11 vertebrae. Insertion :- Superior… Continue reading
Transversus thoracis muscle :- Muscle details :- lies internal to the thoracic cage, anteriorly. It is a thin plane of muscular and tendinous fibers, situated upon the inner surface of the front wall of the chest. Origin :- Costal cartilages of last 3-4 true ribs, body of sternum and xiphoid… Continue reading
Subcostalis muscle :- muscle details :- consist of muscular and aponeurotic fasciculi . origin :- inner surface of one rib . Insertion:- inner surface of the second or third rib below, near its angle. Nerve :- intercostal nerves. Actions :- elevates ribs.
Innermost intercostal muscle :- Muscle details :- a layer of intercostal muscles deep to the plane that contains the intercostal nerves and intercostal vessels and the internal intercostal muscles. Origin :- Infero-posterior border of each rib (above). Insertion:- Supero-posterior border of the rib (below). Nerve:- intercostal nerves. Actions :- Through… Continue reading
Internal intercostal muscles :- muscle detail :- are a group of skeletal muscles located between the ribs. They are eleven in number on either side. origin :- Rib – superior border . Insertion :- Rib – inferior border. Nerve :- Intercostal nerves. Actions :- Hold ribs steady .
External intercostal muscles :- muscle details :- are eleven in number on both sides . origin :- Lower border of ribs . Insertion :- Upper border of rib below . Nerve :- intercostal nerves . Actions :- Inhalation .
Intercostal muscle :- Muscle details :- several groups of muscles that run between the ribs, and help form and move the chest wall . Origin :- ribs 1-11 . Insertion :- ribs 2-12 . Nerve :- intercostal nerves . Action :- Elevation or Depression of the Ribs .
Obliquus capitis inferior muscle :- muscle details :- the larger of the two oblique muscles of the neck. It arises from the apex of the spinous process of the axis and passes laterally and slightly upward, to be inserted into the lower and back part of the transverse process of… Continue reading