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Medical Term:

rhombencephalic isthmus


  1. a constriction in the embryonic neural tube delineating the mesencephalon from the rhombencephalon;
  2. the anterior portion of the rhombencephalon connecting with the mesencephalon.

Synonym(s): isthmus2TA, isthmus of His, isthmus rhombencephali

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.