What is annular ligament in ear?

The annular stapedial ligament (also called the stapediovestibular joint) is a ring of fibrous soft tissue that connects the base of the stapes to the oval window of the inner ear. Calcification and hardening of the annular ligament of the stapes (Otosclerosis) is a common cause of adult deafness.

What is the function of the annular ligament?

Structure and Function The annular ligament stabilizes the radial head within the radial notch of the ulna as it rotates during supination and pronation of the forearm.

What is the ring shaped ligament that holds the footplate of the stapes in the oval window?

Stapedial annular ligament (SAL) provides a sealed but mobile boundary between the stapes footplate and oval window bony wall. Mechanical properties of the SAL affect the transmission of ossicular movement into the cochlea in sound conduction.

What is the oval window in the ear?

The oval window membrane is one of two membranes that separate the middle ear space from the inner ear. The other is the round window membrane. The Eustachian tube [7] connects the middle ear space to the upper part of the throat.

Where is the annular ligament located?

The annular ligament forms a ring that surrounds the radial head, attaching to the anterior and posterior margins of the radial notch of the ulna [1, 6, 7]. Below the radi- al head, the diameter of the ring formed by the annular ligament narrows, providing a tight fit about the neck of the radius [1, 7, 8].

How do you test annular ligaments?

while holding the arm supinated the elbow is then maximally flexed.
the physician’s thumb applies pressure over the radial head and a palpable click is often heard with reduction of the radial head.

What does the stapes transmit vibrations to?

Also called the hammer, it transmits sound vibrations to the incus, which passes them to the stapes. The stapes pushes in and out against a structure called the oval window. This action is passed onto the cochlea, a fluid-filled snail-like structure that contains the organ of Corti, the organ for hearing.