"The porus acusticus internus (plural: pori acustici interni), often merely referred to as porus acusticus, is the medial opening of the internal acoustic canal through which the facial nerve, vestibulocochlear nerve and labyrinthine artery pass1."
Line 1:310·Citations must have a preceding space, e.g. needs evidence <sup>2</sup>. '<sup>1</sup>'