What is fossa incudis?
The fossa of incus (fossa incudis) is a small depression in the lower and back part of the epitympanic recess; it lodges the short crus of the incus.
What are the contents of middle ear?
Ossicles. The middle ear contains three tiny bones known as the ossicles: malleus, incus, and stapes. The ossicles were given their Latin names for their distinctive shapes; they are also referred to as the hammer, anvil, and stirrup, respectively.
Where is the fossa incudis?
epitympanum
The fossa incudis is a small depression in the posteroinferior part of the epitympanum that contains the short crus of the incus and its posterior ligament.
What is epitympanic recess?
The epitympanum, also known as the attic or epitympanic recess, is the most superior portion of the tympanic cavity. It is that portion of the tympanic cavity superior to the axial plane between the tip of the scutum and the tympanic segment of the facial nerve 1,3.
What is the Aditus?
An aditus is the opening to some interior space or cavity. It may refer to: Aditus to mastoid antrum, in the ear. Laryngeal aditus, the opening that connects the pharynx and the larynx. Omental foramen or aditus, in the abdomen.
What is the function of the Stapedius?
In most of the literatures the stapedius muscle is explained as the smallest skeletal muscle in the human body. Its purpose is to stabilise the smallest bone in the body.
What are the 5 parts of the ear?
The parts of the ear include:
- External or outer ear, consisting of: Pinna or auricle. This is the outside part of the ear.
- Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.
- Middle ear (tympanic cavity), consisting of: Ossicles.
- Inner ear, consisting of: Cochlea.
What is Aditus ad antrum?
Anatomical terminology. The aditus to mastoid antrum (otomastoid foramen or entrance or aperture to the mastoid antrum) is a large irregular cavity that leads backward from the epitympanic recess into a considerable air space named the tympanic or mastoid antrum.