Labyrinthine artery

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Labyrinthine artery

The labyrinthine artery, also known as the internal auditory artery, is a crucial blood vessel that supplies the inner ear. It typically branches off from the anterior inferior cerebellar artery (AICA) or, less commonly, directly from the basilar artery.

Anatomy

The labyrinthine artery enters the internal acoustic meatus alongside the vestibulocochlear nerve (CN VIII) and the facial nerve (CN VII). Within the internal acoustic meatus, it divides into two main branches: the cochlear branch and the vestibular branch.

Cochlear Branch

The cochlear branch supplies blood to the cochlea, which is essential for the sense of hearing. The cochlea is a spiral-shaped organ that converts sound waves into nerve impulses.

Vestibular Branch

The vestibular branch supplies the vestibular apparatus, which includes the semicircular canals, the utricle, and the saccule. These structures are vital for maintaining balance and spatial orientation.

Clinical Significance

The labyrinthine artery is of significant clinical importance due to its role in supplying the inner ear. Occlusion or damage to this artery can lead to sensorineural hearing loss and vertigo. Conditions such as labyrinthitis and Meniere's disease can also be associated with compromised blood flow in the labyrinthine artery.

Related Structures

• Anterior inferior cerebellar artery
• Basilar artery
• Vestibulocochlear nerve
• Facial nerve
• Cochlea
• Vestibular apparatus

See Also

• Inner ear
• Hearing
• Balance (ability)