An MRA of the head and neck will show the vessels that may be "crimped" and any other abnormalities in the circulatory system in the head and neck. I had similar symptoms many years ago and no one figured things out for sure till the MRAs. My blood vessels became compromised when I looked upward or jutted my jaw forward due to bulging disks in the neck. The thing about bulging disks is they can go in and out, and are worse in some positions, so it's hard to pick them up sometimes. If an MRA hasn't been done, that would be my first thought.
Hello,
Patients with cerebrovascular disease have partial or complete blockages in the arteries that supply the brain with blood. These blockages can cause a temporary loss of blood flow (called transient ischemic attack, or TIA for short), or permanent loss of blood flow (called stroke; also called cerebrovascular accident).This can lead to impaired blood flow through these arteries and so dizziness.Sometimes a small clot can also cause TIA.
In case MRI is normal,you can go in for MRA(magnetic resonance angiography) or CT angiography.MRA is helpful in diagnosing vertebrobasilar stenosis, although recent data suggest that intracranial vertebral artery disease can be missed. When near occlusion of the carotid artery cannot be distinguished from complete occlusion on MRA or carotid Doppler ultrasound studies, cerebral angiography should be considered.
Please discuss these options with your neurologist.
Take care and pls do keep us posted on how you are doing.