Anatomy

The external ear begins with the external auditory canal and extends to the fibrocartilaginous framework and finally the earlobe. The blood supply arises from the superficial temporal and posterior auricular arteries. The majority of the sensory innervation is from the anterior and posterior branches of the greater auricular nerve. The posterior wall of the external auditory canal is supplied by the auricular branches of the vagus nerve, so lacerations that involve this area must be anesthetized separately.7

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