What is the function of septomarginal trabecula?
Its main function is to convey the right branch of the atrioventricular bundle of the conducting system. The septomarginal trabecula forms the anteroinferior border between the superior, smooth outflow tract of the ventricle and the trabeculated inflow tract.
What is the septomarginal trabecula?
The septomarginal trabecula is a constant element of the anatomy of the human heart, which connects the interventricular septum and the anterior wall of the right ventricle.
What is the function of a moderator band?
Function. The moderator band is important because it carries part of the right bundle branch of the atrioventricular bundle of the conduction system of the heart to the anterior papillary muscle.
What is the function of the trabeculae carneae?
The trabeculae carneae also serve a function similar to that of papillary muscles in that their contraction pulls on the chordae tendineae, preventing inversion of the mitral (bicuspid) and tricuspid valves towards the atrial chambers, which would lead to subsequent leakage of the blood into the atria.
Where is the moderator band and what are its functions?
The moderator band, also called the septomarginal trabecula, is a consistent structure in the morphologic right ventricle and can be helpful as a landmark in situations where the ventricles may be ambiguous (i.e. in some forms of congenital heart disease).
What is the function of the moderator band quizlet?
The moderator band is a cord like structure found in the right ventricle. It contains portions of the cardiac conduction system that help convey the electrical message for the ventricles to contract. It works as a shortcut within the cardiac conduction system.
What is a papillary muscle?
The papillary muscles of the heart are pillar-like muscles seen within the cavity of the ventricles, attached to their walls. They arise from the inner walls of the left and right ventricle and attach to mitral and tricuspid valve leaflets respectively via chordae tendinae.
Where is the moderator band?
right ventricular apex
Location: The moderator band is located in the right ventricular apex that connects the interventricular septum to the anterior papillary muscle.
What is the function of pectinate muscles?
The pectinate muscle develops a stable and large force of contraction and hence is superior to strips cut from atrial appendage specimens.
What is the function of the pectinate muscles and the trabeculae carneae?
Some sources cite that the pectinate muscles are useful in increasing the power of contraction without increasing heart mass substantially. Pectinate muscles of the atria are different from the trabeculae carneae, which are found on the inner walls of both ventricles.
Where is the moderator band quizlet?
The moderator band is a cord like structure found in the right ventricle. It contains portions of the cardiac conduction system that help convey the electrical message for the ventricles to contract.
Where is the moderator band located?
The moderator band (MB, also known as the septomarginal trabecula) found in all human hearts is derived from the muscle band of the interventricular septum, begins below the septal end of the supraventricular crest, and runs toward the anterolateral wall of the ventricle [1].