Four cranial nerves participate in the sensory innervation of the external ear: the trigeminal nerve (V) via the auriculo temporal nerve (V3), the facial nerve (VII) for the Ramsay-Hunt's zone with the conch, tragus, antitragus, a part of the anthelix, of the external auditory meatus and of the eardrum, the glossopharyngeal nerve (IX) via the Jacobson's nerve for the external ear canal and the C2 and C3 cervical plexus. However, there are important interindividual anatomical variations.