Phrenic Nerve

(c) The diaphragm begins to form in the cervical region and descends, which is why it is supplied by the phrenic nerve (C3 to C5) (1).

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(c) The diaphragm begins to form in the cervical region and descends, which is why it is supplied by the phrenic nerve (C3 to C5) (1). (MBChB/BDS EXAMINATION QUESTIONS AND MARKING SCHEME)
The phrenic nerve innervates the diaphragm and, via visceral afferents, the biliary apparatus (Aponeurosis — Anatomy Question Bank)
Referred pain to the right shoulder occurs because the phrenic nerve (C3–C5) shares spinal cord segments with the supraclavicular nerves, which supply the shoulder skin (Aponeurosis — Anatomy Question Bank)
Raised hemidiaphragm may occur with collapse, phrenic nerve palsy or abdominal pathology. (Chest X-ray Interpretation Guide: ABCDE Approach for Medical Students)
Diaphragmatic central and mediastinal: phrenic nerve (C3–C5) (Master First-Year Anatomy: Must-Know Essays & Key Concepts)
Middle mediastinum: heart in pericardium, ascending aorta, pulmonary trunk and veins, phrenic nerves, main bronchi, lymph nodes. (Master First-Year Anatomy: Must-Know Essays & Key Concepts)