Vertebrobasilar Insufficiency is a condition that occurs when there is reduced blood flow to the back part of the brain, which is supplied by the vertebral and basilar arteries. This can lead to symptoms such as dizziness, balance problems, and visual disturbances, often triggered by certain head movements. The condition can result from various factors, including atherosclerosis, which is the buildup of fatty deposits in the arteries, or blood clots. Diagnosis typically involves imaging tests like MRI or CT scans to assess blood flow and identify any blockages. Treatment may include lifestyle changes, medications, or surgical options.