Hi Alisa,
I wanted to look up your question more, so to "Google" I went and found the following below. I guess the answer to your first question, if I'm reading this right, is that TIAs could be a symptom of MM. Before I was properly diagnosed, I was clueless of what a TIA was and didn't realize that the tingling and numbness in my hands and face were actually TIAs!

I read that you also mentioned your "legs failed you." Did your legs become weak just at a moments notice with no warning?

Hmmm.
Well, in my quest to help find answers to your question, I've come across the following sites that may help...
http://www.epilepsy.com/101/ep101_symptom.html
and
http://www.stanfordhospital.com/clinicsmedServices/COE/neuro/moyamoyaDisease/default
Moyamoya Symptoms:
As the vessels narrow the brain receives less blood. This can result in temporary symptoms such as:
Headaches
Numbness or weakness in the extremities
Difficulty speaking
Stroke
Symptoms
Children typically have symptoms including:
Strokes (sustained weakness or numbness in an arm or leg, difficulty speaking, visual abnormalities or problems walking)
Transient ischemic attacks, or TIA’s (temporary stroke-like symptoms that don’t last long)
Headaches
Progressive cognitive or learning impairments
Children also often experience temporary weakness in one or more of their extremities during strenuous physical activity or when crying. Adults can also present with brain hemorrhage causing neurologic symptoms in addition to nonhemorrhagic strokes, TIA’s and headaches.
Seizure Symptoms:
Black out
Confusion
Deafness/Sounds
Electric Shock Feeling
Loss of consciousness
Smell
Spacing out
Out of body experience
Visual loss or blurring
Fear/Panic
Chewing movements
Convulsion
Difficulty talking
Drooling
Eyelid fluttering
Eyes rolling up
Falling down
Foot stomping
Hand waving
Inability to move
Incontinence
Lip smacking
Making sounds
Shaking
Staring
Stiffening
Swallowing
Sweating
Teeth clenching/grinding
Tongue biting
Tremors
Twitching movements
Breathing difficulty
Heart racing
Just remember, this is all textbook information, and we may all have different symptoms from one another, as our individual situations differ. However, I think it is good to know what the symptoms are. ;
I agree with Stephanie's way of thinking about taking meds. Hey, "whatever works" is good for me. I'm all about preventive medicine, if possible. By the way, I

reading your posts, Steph, and hate when you say "I will stop."

I'm thinking in my mind...no, keep going!..continue! ;

Hope this helps Alisa. Take care,
Shan