"The most commonly (75%) involved artery is a loop of the anterior inferior cerebellar artery, and the site of neurovascular compression can be anywhere along the ~10 mm vestibular nerve transition zone from the brainstem 2-4. In-keeping with the bimodal age peaks in affected patients, it has been postulated that in patients affected at a younger age, congenital vascular anomalies are the most likely source of compression and subsequent irritation of the vestibular nerve, while in patients in their middle-age, compression and subsequent irritation develops due to aberrant vascular anatomical changes (e.g. vessel lengthening or widening) caused by age-related progressive atherosclerotic and hypertensive changes 2,3."
"History and etymology"