Ace the CVS Pharmacy Exam 2026 - Your Prescription for Success!

Question: 1 / 400

Which nerve is NOT involved in the innervation of the pericardium?

Vagus nerve

Phrenic nerve

Sympathetic nerve

Radial nerve

The radial nerve is not involved in the innervation of the pericardium because it primarily serves the upper limb, including the forearm and hand. Its role is focused on motor and sensory functions in the arm and hand, particularly in the extension of the elbow, wrist, and fingers, as well as sensation in various parts of the arm.

In contrast, the vagus nerve provides parasympathetic innervation to the heart and is involved in regulating cardiovascular functions. The phrenic nerve plays a crucial role in innervating the diaphragm, which is located close to the pericardium, and it also provides sensory fibers to the pericardium itself. Sympathetic nerves, deriving from the sympathetic trunk, contribute to the autonomic regulation of the heart as well. Therefore, the radial nerve, which does not have any anatomical or functional connection to the pericardium, distinguishes itself from the other options.

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