Middle cardiac nerve

Middle Cardiac Nerve

The Middle Cardiac Nerve (also known as the great cardiac nerve) is a branch of the sympathetic trunk, a part of the autonomic nervous system. It plays a crucial role in the regulation of the heart's function.

Etymology[edit | edit source]

The term "Middle Cardiac Nerve" is derived from its anatomical position. It is one of the three main cardiac nerves, along with the superior cardiac nerve and the inferior cardiac nerve. The term "cardiac" comes from the Greek word "kardia", meaning heart.

Anatomy[edit | edit source]

The Middle Cardiac Nerve arises from the middle and lower parts of the cervical ganglia, and occasionally from the first thoracic ganglion. It descends behind the common carotid artery and the vagus nerve, and in front of the longus colli muscle. It then joins the deep part of the cardiac plexus.

Function[edit | edit source]

The Middle Cardiac Nerve carries sympathetic fibers to the heart. These fibers increase the heart rate, force of contraction, and blood pressure. They also constrict the coronary arteries.

Clinical Significance[edit | edit source]

Damage to the Middle Cardiac Nerve can lead to various heart conditions, including arrhythmias, heart failure, and ischemic heart disease. It can also affect the regulation of blood pressure.

Related Terms[edit | edit source]

Middle cardiac nerve Resources
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