Trabeculae carneae

Trabeculae carneae are muscular ridges found within the ventricles of the heart. They are part of the cardiac muscle and play a crucial role in the functioning of the heart.

Etymology

The term "trabeculae carneae" is derived from Latin, where "trabeculae" means "small beam" and "carneae" means "of flesh". This name is descriptive of their appearance as small, meaty beams within the heart.

Structure

Trabeculae carneae are irregular muscular columns which project from the inner surface of the right ventricle and left ventricle of the heart. They are different from the papillary muscles, which are also muscular projections from the ventricular walls, but serve a different function.

Function

The primary function of the trabeculae carneae is to prevent suction that would occur with a flat surfaced membrane and to increase the flow of blood within the ventricles. They also help in reducing the stress of pressure that is exerted on the ventricular walls.

Clinical significance

Abnormalities in the trabeculae carneae can lead to various heart conditions. For instance, excessive trabeculations can be a sign of a condition known as left ventricular noncompaction, a rare congenital cardiomyopathy that can lead to heart failure.

Related terms

• Ventricles of the heart
• Cardiac muscle
• Papillary muscles
• Left ventricular noncompaction

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