spiral ligament

The stria vascularis and spiral ligament are often normal.

The basal cells separate stria vascularis from the underlying spiral ligament.

It gives attachment to the outer edge of the basilar membrane and is a spiral ligament that projects inward below as a triangular prominence.

The lateral wall of the cochlear duct is formed by the spiral ligament and the stria vascularis, which produces the endolymph.

The upper portion of the spiral ligament contains numerous capillary loops and small blood vessels, and is termed the stria vascularis.

The periosteum, forming the outer wall of the ductus cochlearis, is greatly thickened and altered in character, and is called the spiral ligament.

It may result from direct injury to the cochlea and spiral ligament from the lytic process or from release of proteolytic enzymes into the cochlea.

A spiral ligament and a cartilaginous process called the modiolus connect and support the cochlear duct to the rest of the cartilaginous structures that surround it.

There are certainly a few well documented instances of sclerotic lesions directly obliterating sensory structures within the cochlea and spiral ligament, which have been photographed and reported post-mortem.