What is the stria vascularis?

The stria vascularis is a crucial structure located in the cochlea of the inner ear. Its primary function is to maintain the ionic composition of the endolymph fluid, which is essential for the proper functioning of hair cells in the auditory system. The stria vascularis is composed of a rich network of capillaries and secretory cells that actively transport ions, particularly potassium, into the endolymph, resulting in the unique electrochemical environment necessary for sound transduction.

This structure plays a vital role in hearing, as it supports the electrochemical gradients that hair cells rely on to convert sound vibrations into electrical signals. The overall health and functionality of the stria vascularis directly impact the ability to hear, making its function in secreting endolymph critical.