SULCUS AMPULLARIS Meaning and
Definition
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The term "sulcus ampullaris" refers to a specific anatomical feature found in the inner ear. It is a small groove or depression located within the ampulla, which is a bulbous enlargement present in the semicircular canals of the ear.
The semicircular canals are part of the vestibular system and are responsible for sensing rotational movements of the head. There are three semicircular canals in each ear, oriented in different directions to detect movements in different planes. Each of these canals contains an ampulla, and within each ampulla lies the sulcus ampullaris.
The sulcus ampullaris plays a vital role in the function of the semicircular canals. It contains specialized sensory cells known as hair cells, which are responsible for detecting changes in fluid movement within the canals. The hair cells in the sulcus ampullaris have hair-like projections called stereocilia, which are displaced by the movement of the surrounding fluid. This displacement creates electrical signals that are transmitted to the brain via the vestibular nerve, ultimately allowing us to maintain balance and perceive changes in head position and movement.
The sulcus ampullaris, along with the ampulla and semicircular canals, is crucial for the body's sense of spatial orientation and equilibrium. Disruptions or disorders of these structures can lead to conditions such as vertigo, dizziness, and balance problems. Understanding the anatomy and function of the sulcus ampullaris is essential for diagnosing and treating these issues in clinical settings.
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Ampullary sulcus, a slight groove on the external surface of that part of the ampulla of each semicircular duct of the labyrinth which corresponds to the convex side of the duct, it is where the nerve enters.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SULCUS AMPULLARIS
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- s ulcus ampullaris
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- sulcus ampu llaris
- sulcus ampul laris
- sulcus ampull aris
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- sulcus ampullari s
Etymology of SULCUS AMPULLARIS
The word "sulcus" derives from the Latin word "sulcus", meaning a furrow, groove, or trench. "Ampullaris" is derived from the Latin word "ampulla", which refers to a small flask or bottle, often used in ancient Rome to contain perfumes or oils. Therefore, the term "sulcus ampullaris" can be broken down as follows: "sulcus" meaning groove or furrow, and "ampullaris" referring to the flask-like shape of the structure being described.
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