I have had an MRA. It is basically a double MRI. During the MRI, they set up the sensors to only recognize the non-blood tissues in the brain. They then subtract the MRI image without the blood showing from the complete MRI image. The result is the blood vasculature. The images are quite interesting. Mine shows a 'slight out pouching' in the top of my brain stem that would be considered an aneurism if it was larger. The small size is not a concern. Lucky because brain stem aneurisms are all but impossible to treat.
There are ultra-sound images they can do to look at the vasculature in the brain. It is called Dopler Ultra Sound.
Have you had a tilt table test? This evaluate how your body reacts to changes in postural position. Some times, a therapist will prescribe exercises where you slowly change positions to stimulate the vaso-constrictors to operate better. Injury to cerebral vaso-constriction function is common with head injuries.
Mark in Idaho
60 years old, retired due to disability, married 34 years, father of three, grandfather of four, Suffered a serious concussion at 10 years old (1965) stopped most driving after concussion at 46 years old (2001), Post Concussion Syndrome/Multiple Concussion/Impact Syndrome with PTSD, immediate/short term visual and auditory memory problems, slowed processing speed, visual/auditory processing difficulties, insomnia, absence seizures, OCD, 14 concussions since first concussion at 8 years old, Taking paroxetine for 14 years and gabapentin for 12 years. Added L-Tryptophan and stopped paroxetine after 3 months of tapering. I currently take 100 mgs of 5-HTP AM, 500 mgs of L-Tryptophan at noon.
As of Nov 15th, Due to high stress issues resulting in PTSD, docs put me on 3 meds. Clonazepam but only for 30 days ) .125 mgs twice daily (Doc presc. .25 mgs 2x daily but half a tablet is good) , citalopram (Celexa), an SSRI , and olanzapine (Zyprexa), an atypical anti-psychotic that usually causes weight gain before bed. I lost over 30 pounds since mid July. It just stopped the weight loss. Took me off the gabapentin.
May 2014, I am off the olanzapine due to a 6 fold price increase. Back on 600 mgs of gabapentin before bed.
Oct 2014, off the Celexa. The 5-HTP is doing much better and leaves me feeling normal as compared to being on an SSRI.
I am also taking L-Theanine to help with GABA regulation
"Be Still and Know That I am God" Psalm 46:10