The Cervical Plexus is a network of nerves located in the neck, formed by the anterior rami of the first four cervical spinal nerves, labeled as C1 to C4. It primarily supplies sensory and motor innervation to the neck, shoulders, and parts of the head. Key branches include the phrenic nerve, which controls the diaphragm, and the lesser occipital nerve, which provides sensation to the skin behind the ear. This plexus plays a crucial role in various bodily functions, including breathing and neck movement. It also contributes to the brachial plexus, which innervates the upper limb. Understanding the cervical plexus is essential for medical professionals, especially in anesthesia and surgery involving the neck region.