Phrenic nerve

The Phrenic Nerve is a crucial nerve in the human body that originates from the neck (cervical) region and extends down to the diaphragm. It plays a significant role in the respiratory system, primarily controlling the contraction and relaxation of the diaphragm.

Anatomy

The Phrenic Nerve is composed of fibers from the third, fourth, and fifth cervical nerves (C3–C5). It descends obliquely across the anterior surface of the scalene anterior muscle, passing between the subclavian artery and vein.

Function

The primary function of the Phrenic Nerve is to carry nerve impulses to the diaphragm, which controls breathing. It also provides sensory innervation to parts of the pleura and peritoneum.

Clinical Significance

Damage to the Phrenic Nerve can lead to dyspnea (shortness of breath) and other respiratory issues. Conditions such as Phrenic nerve palsy and Diaphragmatic paralysis are associated with Phrenic Nerve damage.

See Also

• Nervous system
• Respiratory system
• Diaphragm

External Links

• Healthline: Phrenic Nerve

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  Phrenic nerve anatomy
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  Phrenic nerve pathway
• Phrenic nerve function test
  Phrenic nerve function test