Inferior cardiac nerve

Inferior cardiac nerve

The Inferior cardiac nerve or inferior cardiac branch is a branch of the vagus nerve that contributes to the cardiac plexus. It is also known as the lower cardiac nerve.

Etymology

The term "Inferior cardiac nerve" is derived from the Latin words "inferior" (meaning lower) and "cardiacus" (pertaining to the heart). The term "nerve" is derived from the Latin "nervus", meaning sinew or string.

Anatomy

The inferior cardiac nerve arises from the vagus nerve near the base of the neck. It descends behind the subclavian artery and along the front of the trachea, to join the deep part of the cardiac plexus. It is distributed to the deep part of the cardiac plexus, and is connected with the recurrent nerve and the sympathetic.

Function

The inferior cardiac nerve carries parasympathetic fibers to the heart. These fibers help to slow the heart rate, reduce the force of the heart's contractions, and constrict the coronary arteries.

Clinical significance

Damage to the inferior cardiac nerve can result in a variety of cardiac disorders, including arrhythmia, bradycardia, and tachycardia. It can also lead to cardiac arrest in severe cases.

Related terms

• Vagus nerve
• Cardiac plexus
• Parasympathetic nervous system
• Sympathetic nervous system

See also

• Superior cardiac nerve
• Middle cardiac nerve

References

Inferior cardiac nerve Resources
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