What is the Epitympanum?
What is the Epitympanum?
Epitympanum. The epitympanum is a middle ear space that lies superior and medial to the tympanic rim. It is a critical area for cholesteatoma occurrence and contains many complex structures that determine middle ear ventilation patterns and also present significant challenges for cholesteatoma excision.
What is the tegmen Mastoideum?
The tegmen is the thin osseous plate that separates the middle cranial fossa from the tympanic and mastoid cavities of the temporal bone. It is comprised of two or three parts 1,2: tegmen mastoideum (roof of the mastoid cavity)
What is Mesotympanum?
[mes″o-tim´pah-num] the portion of the middle ear medial to the tympanic membrane.
What is COG anatomy?
A coronally oriented bony septum named the anterior attic bony plate or “Cog” partitionates the anterior epitympanic recess-AER from the epi-tympanum proper (attic) [9]. Köerner’s septum is viewed in CT images as a dense bony plate found in the mastoid process.
What is the Aditus?
Medical Definition of aditus : a passage or opening for entrance.
Which structure is located in the epitympanum of the ear?
The head of the malleus and the body of the incus are joined tightly and are suspended in the epitympanum just above the upper rim of the tympanic annulus, where three small ligaments anchor the head of the malleus to the walls and roof of the epitympanum.
What is processus Cochleariformis?
The processus cochleariformis is a spoon-shaped bony angular process above the promontory at he end of the canal for the tensor tympany and at the anterior end of the vestibular window, forming a pulley over which the tendon of the tensor tympani muscle plays.
What is tegmen tympani dehiscence?
High-resolution CT scan (coronal view) of the right temporal bone. Dehiscence of the tegmen tympani with meningoencephalocele. 8. Superior semicircular canal dehiscence (SSCD) is thinning or absence of the otic capsule bone over the SSC. It was first described by Lloyd Minor in 2000.
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 called centre of gravity?
Your centre of gravity is the point where the mass of the body is concentrated. Centre of Gravity. The centre of gravity (COG) of the human body is a hypothetical point around which the force of gravity appears to act. It is point at which the combined mass of the body appears to be concentrated.
What is Aditus and 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.
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.
What is the anatomy of the eye?
Anatomy of the Eye. Eyes. Anterior chamber. The front section of the eye’s interior where aqueous humor flows in and out, providing nourishment to the eye. Aqueous humor. The clear watery fluid in the front of the eyeball. Blood vessels. Tubes (arteries and veins) that carry blood to and from the eye. Caruncle.
What is the function of epitympanum?
Posteriorly the epitympanum is in direct continuity with the mastoid antrum via the aditus ad antrum, and thence the mastoid air cells. Its main contents are the head of the malleus and body and short process of the incus, which articulate with each other at the incudomalleolar joint.
How is the anterior epitympanum formed?
The anterior epitympanum can be formed from a single large air cell, or by several small air cells, and this makes the anterior epitympanum a variable anatomic space in an anterior-posterior direction.
What is the opening in the middle of the eye called?
The opening in the middle of the iris through which light passes to the back of the eye. Retina. The light-sensitive nerve layer that lines the inside of the back of the eye. The retina senses light and creates impulses that are sent through the optic nerve to the brain. Sclera.
