A rhombus is a quadrilateral with all 4 sides being the same length. For example, look at the chopped-off pyramid on the back of a U.S. one dollar bill. The front face you see under the eye is a trapezoid, since it has 4 sides, and the top parallel with the bottom. A square is one example of a rhombus, but you can have a rhombus that isn't a square.
Causes of Trigeminal Neuralgia. In many cases, the cause of TN is never found. According to the National Institute of Neurological Disorders and Stroke, although anyone can get TN, itâs more common among women than men. Itâs also more common in people over the age of 50, although it can occur at any age.
Pain may involve any of these locations but usually involves the second or third divisions, either alone or in combination. Trigeminal neuralgia may involve the first division but usually in association with the second division. Pain in only the first division is often not trigeminal neuralgia. back to top What causes Trigeminal Neuralgia? The trigeminal nerve carries messages regarding sensation from the face to the brain. Patients with Trigeminal Neuralgia have a defect in the covering of the trigeminal nerve, which allows abnormal cross-talking between nerves that usually carry messages of normal non-painful sensation with nerves that carry painful messages.