Root: C3
Associated nerves:
Great auricular nerve
Transverse cervical nerve
Supraclavicular nerve
Ansa cervicalis
Phrenic nerve
Segmental branches of cervical plexus
Motor innervation:
Omohyoid (inferior belly)
Sternohyoid (lower part)
Sternothyroid (lower part)
Diaphragm
Sensory innervation:
Face, over the parotid gland
Inferior part of the auricle
Mastoid process
Anterior and lateral parts of the neck
Skin above the clavicle
Skin over the pectoralis major and deltoideus
Skin of the upper and posterior parts of the shoulder
Pericardium and pleura