Galen's anastomosis is between ?

There are two types of impoant anastmosis between laryngeal branches of vagus :? 1) Galen anastomosis (Ramus anastomoticus or Ansa of Galen) This is an anastomosis between the recurrent laryngeal nerve and internal laryngeal nerve (internal branch of superior laryngeal nerve). Generally, posterior branch of recurrent laryngeal nerve contributes to the anastomosis; however, anterior branch can also contribute. 2) Human communicating nerve It is an anastomosis between recurrent laryngeal nerve (distal pa) and external laryngeal nerve (external branch of superior laryngeal nerve).