posterior ligament of incus posterior ligament of incus the posterior ligament of the incus is a fibrous band that connects the tip of the short crus of the incus to the fossa incudis, running to the mastoid (posterior wall of the middle ear chamber). the posterior incudal ligament plays an important role in the vibration of the middle ear bones: together with the anterior ligament of the malleus, it forms a pivotal axis around which the ossicles rotate. this rotation conveys vibrations from the tympanum to the oval window on the bony labyrinth (where they can be transduced into electrical signals transmitted to the nervous system). anatomy of hearing and balanceouter ear auricle helix antihelix tragus antitragus intertragic notch earlobe ear canal auricular muscles eardrum umbo pars flaccida middle eartympanic cavity medial structures oval window round window secondary tympanic membrane prominence of facial canal promontory of tympanic cavity posterior structures mastoid cells aditus to mastoid antrum pyramidal eminence ossicles malleus superior ligament lateral ligament anterior ligament incus superior ligament posterior ligament stapes annular ligament muscles stapedius tensor tympani auditory tube /eustachian tube torus tubarius inner earlabyrinths membranous bony auditory systemgeneral cochlea vestibular duct helicotrema tympanic duct modiolus cochlear cupula perilymphatic space perilymph cochlear aqueduct cells claudius boettcher cochlear duct /scala media reissner's/vestibular membrane basilar membrane reticular membrane endolymph stria vascularis spiral ligament organ of corti stereocilia tip links tectorial membrane sulcus spiralis externus internus spiral limbus vestibular systemvestibule utricle macula saccule macula kinocilium otolith otolithic membrane vestibular aqueduct endolymphatic duct endolymphatic sac ductus reuniens semicircular canals superior posterior horizontal ampullary cupula ampullae crista ampullaris authority control terminologia anatomica posterior ligament of incusdetailsfromincustoincusidentifierslatinligamentum incudis posteriusta98a15.3.02.058ta21643fma60883anatomical terminology this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.