Labyrinthine wall of tympanic cavity
Encyclopedia
The Labyrinthic or Medial Wall is vertical in direction, and presents for examination the oval window
and round window
, the promontory
, and the prominence of the facial canal
.
Oval window
The oval window is a membrane-covered opening which leads from the middle ear to the vestibule of the inner ear.Vibrations that come into contact with the tympanic membrane travel through the three ossicles and into the inner ear...
and round window
Round window
The round window is one of the two openings into the inner ear. It is closed off from the middle ear by the round window membrane, which vibrates with opposite phase to vibrations entering the inner ear through the oval window...
, the promontory
Promontory
Promontory may refer to:*Promontory, a prominent mass of land which overlooks lower lying land or a body of water*Promontory, Utah, the location where the United States first Transcontinental Railroad was completed...
, and the prominence of the facial canal
Prominence of the facial canal
The prominence of the facial canal indicates the position of the bony canal in which the facial nerve is contained; this canal traverses the labyrinthic wall of the tympanic cavity above the fenestra vestibuli, and behind that opening curves nearly vertically downward along the mastoid wall....
.