Cervical Plexus (EASY Scheme) | Anatomy

Introduction and Topography00:00:07

An overview of the cervical plexus, explaining its role in supplying structures in the head and neck. The section introduces the basic spinal cord segments (C1-C4) and how the anterior branches of these spinal nerves form the plexus.

Somatosensory Branches00:03:12

A detailed scheme of the somatosensory nerves, including the transverse cervical nerve, greater auricular nerve, lesser occipital nerve, and the supraclavicular nerves, which handle sensory input from the neck and surrounding areas.

Motor Branches and Ansa Cervicalis00:06:16

Explanation of the muscular branches supplying deep neck muscles and the formation of the Ansa Cervicalis. This part details the loop created by C1-C3 that innervates specific infrahyoid muscles.

The Phrenic Nerve00:09:50

Discussion of the phrenic nerve, formed from C3, C4, and C5. It is identified as the most critical nerve of the plexus due to its role in motor control of the diaphragm and its importance for respiratory function.

Relationship with the Accessory Nerve00:12:22

Explains the interaction between the cervical plexus and the 11th cranial nerve (accessory nerve), specifically how they contribute to the innervation of the trapezius and sternocleidomastoid muscles.