{{Update History}}== Events ==* [[Leonard McCoy]] develops a revolutionary medical procedure involving [[brain]] tissue engrafting / neural implants.
== Events ==
* [[Leonard McCoy]] develops a revolutionary medical procedure involving [[brain]] tissue engrafting.
:''Given Leonard McCoy's birthyear as [[2227]], 2253 would be the year in which McCoy graduated from medical school assuming four years of pre-med, followed by four years of medical school, with McCoy having started college at the age of 18. McCoy's exact medical school graduation date has never been confirmed in a ''Star Trek'' production.''