The middle voice in Ancient Greek can be said to code that the subject is the Endpoint of the event... Eleven middle uses, in all, were distinguished: passive middle, spontaneous process middle, mental process middle, body motion middle, collective motion middle, reciprocal middle, direct reflexive middle, perception middle, mental activity middle, speech act middle, and indirect reflexive middle.
This passage presents the monograph's comprehensive conclusion: the Greek middle voice encodes the subject as event-Endpoint and ramifies into eleven semantically interrelated uses mapped as a polysemous network.
, The Middle Voice in Ancient Greek A Study of Polysemy, 2003thesis