Transverse abdominal Muscle Anatomy The transverse abdominal muscle, often referred to as the TVA, is a crucial component of the core that lies beneath the rectus abdominis and obliques. a muscle layer of the anterior and lateral (front and side) abdominal wall which is deep to (layered below) the internal oblique muscle. It is thought…
Serratus Posterior Superior Muscle Anatomy The serratus posterior superior muscle is a thin, flat muscle located in the upper back region. Comprising a part of the intrinsic musculature of the back, the serratus posterior superior plays a crucial role in respiratory mechanics and postural support. The upper and lower back contain two paired muscles called…
Serratus Posterior Inferior Muscle Anatomy The serratus posterior inferior is one of the muscles of the back, specifically in the thoracic region. It is part of the deeper layer of muscles in the back and is situated inferior (lower) to the serratus posterior superior muscle. The serratus posterior inferior is named for its serrated or…
Levatores Costarum Muscles Anatomy Levatores costarum muscles is a 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. It is located on either side of the posterior aspect of the thoracic vertebra they go…
Transversus thoracis muscle Anaomy Transversus thoracis muscle 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. On the inside surface of the anterior chest wall, there is a muscle called transversus thoracis (also known as…
Subcostalis Muscle Anatomy Subcostalis muscle are the narrow muscles that span two or three intercostal gaps and are located on the inner surface of the posterior thoracic wall. They make up the intrinsic musculature of the chest wall along with the intercostal, serratus posterior, levatores costarum, and transversus thoracis muscles. The subcostal muscles maintain the…
Innermost intercostal muscle is 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 supply: intercostal nerves. Blood Supply: Actions: Through adduction of upper ribs to the lower…
Internal intercostal muscles 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 are eleven in number on both sides. origin: Lower border of ribs. Insertion : Upper border of rib below. Nerve: intercostal nerves. Actions: Inhalation.
Intercostal muscles are several groups of muscles that run between the ribs and help form and move the chest wall. The intercostal muscles are a group of muscles located between the ribs in the thoracic (chest) region. They play an important role in the respiratory system by assisting with breathing. There are three layers of…
