Citation, DOI & article data
The membranous labyrinth or endolymphatic labyrinth is the part of the inner ear housed in the osseous labyrinth. It comprises 3 distinct, but joined, sensory sacs and ducts supplied by the vestibulocochlear nerve (CN VIII):
- cochlear duct (scala media) in the cochlea, responsible for hearing
- utricle and saccule in the vestibule, responsible for static balance
- semicircular ducts in the semicircular canals, responsible for kinetic balance
The inferior vestibular branch of the vestibulocochlear nerve (CN VIII) supplies the saccule. The inferior vestibular branch also gives off the singular nerve which courses through foramen singulare to supply the posterior semicircular duct.
The superior vestibular branch of the CN VIII supplies the utricle, superior (anterior) and lateral (horizontal) semicircular ducts.
The cochlear branch of CN VIII supplies the cochlear duct.
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