Modiolus
Modiolus (medicine)
Modiolus (pronunciation: /moʊˈdaɪ.ələs/) is a term used in anatomy and medicine to refer to a certain type of conical structure. The term is derived from the Latin word 'modiolus', which means 'little hub'.
In the context of human anatomy, the modiolus is a conical structure in the cochlea of the inner ear. It is the central axis of the cochlea, around which the cochlear duct spirals. The modiolus contains the spiral ganglion, which is responsible for transmitting nerve impulses from the hair cells in the cochlea to the brain.
In dentistry, the term modiolus is also used to refer to the point near the corner of the mouth where the muscles of the upper and lower lips intersect. This is an important landmark for facial reconstruction surgery and other procedures.
Related Terms
- Cochlea: The spiral-shaped, fluid-filled inner ear structure; it is lined with cilia (tiny hairs) that move when vibrated and cause a nerve impulse to form.
- Spiral Ganglion: A group of nerve cells that serve as the relay station of the auditory nerve in the cochlea.
- Inner Ear: The innermost part of the ear, containing the cochlea, vestibule, and semicircular canals, which are involved in hearing and balance.
See Also
External links
- Medical encyclopedia article on Modiolus
- Wikipedia's article - Modiolus
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