[Right branch of the bundle of His. From morphology to its function].

A histological study of serial sections of 71 right branches of the bundle of His has enabled us to confirm the classical findings, but also lay emphasis on certain facts which are not so well known: --the presence or early collateral branches; --the concept of a septal nerve ending; --variations in its course associated with abnormalities in the relationship of the conus with the inferior part of the septum. Certain embryological and functional implications of these facts are noted.