Which nerve plexus is associated with the cervical spinal nerves?

The cervical nerve plexus is formed by the anterior rami of the first four cervical spinal nerves (C1-C4). It plays a vital role in providing motor and sensory innervation to various structures in the neck, diaphragm, and upper shoulder area. Important nerves that arise from this plexus include the phrenic nerve, which is crucial for diaphragm movement and respiration.

Understanding the formation and function of the cervical plexus is essential, as it highlights how the spinal nerves function to innervate specific regions of the body. In contrast, the other nerve plexuses—such as the brachial, lumbar, and coccygeal—are associated with different sets of spinal nerves and regions, focusing on areas like the arms, legs, and the region around the coccyx, respectively.