Neurology | Cervical Plexus

📚 Premium Notes & Illustrations for Cervical Plexus: https://www.ninjanerd.org/lecture/cervical-plexus

Ninja Nerds!
Join us in this lecture, where Professor Zach Murphy will discuss the cervical plexus, a network of nerves formed by the anterior rami of spinal nerves C1 through C4. We begin by exploring the anatomical location of the plexus deep to the sternocleidomastoid muscle and its organization into superficial sensory and deep motor branches. The sensory branches, including the lesser occipital, great auricular, transverse cervical, and supraclavicular nerves, are reviewed with their respective cutaneous innervation patterns to the head, neck, and upper shoulder region.

We then examine the deep motor branches, highlighting their role in innervating infrahyoid muscles through the ansa cervicalis and their contribution to the phrenic nerve, which is essential for diaphragmatic function. The lecture emphasizes the cervical plexus’s clinical importance, including nerve block techniques, anatomical relationships with surrounding structures, and the impact of injury on both sensory and motor function.

We also discuss how the cervical plexus integrates with other neural pathways in the neck, its contribution to reflex arcs such as the cervical cutaneous reflex, and its coordination with cranial nerves in head and neck movements.

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