Posterior Auricular Nerve: The stylo-mastoid foramen is the structure closest to the posterior auricular nerve and the latter runs in an upward manner to the front of the mastoid process. This is also known as the auricularis posterior. The posterior auricular nerve also makes an intricate communication between the posterior branch of the great auricular and the lesser occipital as well. This arises from the external acoustic meatus wherein it splits into the auricular and occipital branches. Each of the branches has its specific functions. The Auricularis posterior and the intrinsic muscles of the auricular, specifically on its cranial surface, are being nourished by the auricular branch. On the other hand, the occipital branch, the larger of two branches, is primarily responsible for supplying the Occipitalis.