Phrenic nerve
Plexus: Cervical
Roots:
C3
C4
C5
Origin: Mainly from the 4th cervical nerve with contributions from the 3rd and 5th
Motor innervation:
Diaphragm
Roots:
C3
C4, C5
Sensory innervation:
Pericardium and pleura
Branch: Phrenic nerve
Roots:
C3
C4
C5