Content:
Introduction: 0:00
Topography of Cervical Plexus 01:02
Somatosensory Nerves of Cervical Plexus 02:53
Motor Nerves of Cervical Plexus: 06:13
Mixed Nerves of Cervical Plexus: 09:50


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Topography:
Anterior branch of spinal nerve
From spinal nerve C1, C2, C3, C4

Somatosensory Branches (mechanoreceptors, exteroreceptors, prorioceptors, thermoreceptors)
Transverse Cervical Nerve (nervus transversus colli) from C2 and C3
○ Divides into inferior branch for the skin of the infrahyoid region, and superior branch for the skin of the suprahyoid region. Superior branch forms superficial ansa cervicalis for platysma
Greater auricular nerve (nervus auricularis magnus) from C2 and C3
○ Innervates the skin over the ear and parotid glands.
○ Anterior branch for anterior part of auricle and parotid
○ Posterior branch for the posterior parts
Lesser occipital Nerve (nervus occipitalis minor) from C2 and C3
○ Supplies skin of occiput and the posteror neck and lateral back of neck
Supraclavicular nerves (Nervi supraclaviculares) from C3 and C4


Motor Branches
Muscular Branches (rami musculares) from C1C4
Deep cervical loop (ansa cervicalis profunda) for the infrahyoid muscles
○ Formed by Superior root (radix superior) – C1 and C2
○ Inferior root (radix inferior) – C2 to C3

Mixed Branches
Phrenic nerve (nervus phrenicus) – C3 to C5
○ Phrenic branches (rami phrenici)
○ Pericardial branches (rami pericardiaci)
○ Pleural branches (rami pleurales)
○ Phrenicoabdominal branches (rami phrenicoabdominales)
○ Sensory branches for the thymus
Accessory Nerve (Spinal Part)