Semicircular canals
Fluid filled tubes that determine our body position and give us balance
The semicircular canals are part of the inner ear and are responsible for detecting rotational movements of the head. There are three semicircular canals: the anterior, posterior, and horizontal (lateral) canals. Each canal is filled with a fluid called endolymph and is lined with tiny sensory hair cells called stereocilia. When the head rotates, the motion of the endolymph inside the canals causes the stereocilia to bend, which sends signals to the brain through the vestibular nerve.
The semicircular canals are essential for our sense of balance and coordination. They work in conjunction with other structures in the inner ear, such as the utricle and saccule, to help us maintain our equilibrium and navigate through our environment. Dysfunction of the semicircular canals can lead to symptoms such as dizziness, vertigo, and loss of balance, which can significantly impact a person’s quality of life. Treatment for semicircular canal disorders may include vestibular rehabilitation exercises, medication, or in severe cases, surgery.
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