Considerations Regarding the Mechanism of Endolymph Circulation,
TORONTO UNIV (ONTARIO) DEPT OF OTOLARYNGOLOGY
Pagination or Media Count:
It has for some time been taken for granted that circulation of endolymph is generated by a secretion to serve the purpose of cell nutrition of the membranous inner ear. From past studies conclusions have been drawn that from the point of view of endolymph circulation, active secretional processes are negligible. Nevertheless, the existence of a flow of endolymph from the cochlea saccule to the endolymphatic sac, and from the vestibular apparatus has since been so well documented, that its existence cannot be denied. The force producing this flow to the endolymphatic sac is not known to date. It could be either the pressure of a secretion in the peripheral labyrinth as generally assumed or a suction at the central end, i.e. the endolymphatic sac. Secretion as a source of pressure seems extremely unlikely. What remains, then, is a pulling force produced by the excretion through the endolymphatic sac as a source for the so-called longitudinal flow.
- Anatomy and Physiology