The structure through which the vessels pass in the bone, is called Havers duct, and these in turn are located inside the bone canalicules, if a response is to be chosen, serious bone canalicules.
There are no medications that specifically treat dissociative disorders, but a doctor may prescribe antidepressants, anti-anxiety medications or antipsychotic drugs to help ease the symptoms. Especially since DID/OSDD is directly linked to childhood trauma.