Anatomy of ear related to the ear anesthesia administration Administration of ear anesthesia is concerned with external ear. The external ear consists of pinna, also called auricle, and ear canal. Pinna is the visible part of ear which is mainly covered by skin, hair and glands. It is further divided into concha, lobule, tragus, helix and antihelix. To understand the ear anesthesia administration, it is important to recognize the sensory nerve supply of ear. 1. Greater auricular nerve – Innervates inferior, posterolateral and posteromedial auricle 2. Auriculotemporal nerve – Innervates anteromedial and anterosuperior auricle 3. Auricular branch of vagus nerve – Innervates most of the part around external auditory canal and concha 4. Lesser occipital nerve – Innervates helix