1)Would have to look at the scans myself, but yes the symptoms could be caused by the cervical disc problem. In addition to the crunching, pain, and tingling which is more readily linkable to the disc problem, there is an entity called cervicogenic vertigo which is dizziness caused by disc disease (usually from trauma).
2) The clinical history surrounding the accident, your neuro exam, and the presence/absence of any stroke risk factors (such as prior stroke, heart disease, cholesterol problems, smoking, and diabetes) as well as a normal MRI fo the brain that shows no evidence for cerebrovascular disease can be used to support or refute the possibility of you having had a TIA. If everything is clean,then it is unlikely you had a TIA out of the blue. This should be something your neurologist can help you with. GOod luck
I was also in a car accident from which I suffered a disc herniation. However, my disc level was c6-c7. I did have similar symptoms as yours. Left side weakness. Most intense was pain in my left shoulder. Alot of referred pain from the neck is between the shoulder blades and weakness to the involved nerve root. I had severe cracking sounds in the neck with horrible headaches. Since the fusion I have never had another headache like I did before the fusion. It helped alot. It also somtimes helps to keep a daily journal before seeing the doctor so he can really get a good idea of what you have been experiencing. If I have learned anything about my 2 1/2 years of doctors and surgeries is that, you have to be educated on your symptoms and be proactive in your treatment. What you may think are weird occurances could really prove to be a clue in your diagnosis. Best of Luck to you.
The following is from Mayo Clinic:
"TIAs typically last from 2 to 30 minutes. All effects disappear within 24 hours. TIA signs and symptoms resemble those found early in a stroke and may include:
Sudden weakness, an abnormal feeling, or paralysis in your face, arm or leg, typically on one side of your body; slurred or garbled speech or difficulty understanding others; sudden blindness in part of your visual field, sometimes as if a gray or black curtain is falling over or crossing your visual field; dizziness, loss of balance or loss of coordination."
My husband has a history of stroke/TIAs. I took him to the ER last year when he experienced numbness in his leg. The doctors there insisted that it was a TIA. However, the tests they ran did not confirm this. They sent him home and told us to make an appointment to see his neurologist. However, no one in the ER would listen to me when I said that we thought his problem had to do with that surgery. I kept trying to get them to do an ultrasound, etc., of his abdominal region. They kept focusing on the fact that he had a history of stroke -- and assumed that he had experienced another one.
When we saw his neurologist a few days later, the symptoms were still there. He ran tests, including a carotid doppler and MRI. He told us that it wasn't a mini-stroke because the symptoms would have disappeared by then. It turned out to be a blocked artery (he has an implant due to an abdominal aortic aneurysm). The neurologist sent us back to my husband's vascular surgeon. He wouldn't run any abdominal-related tests on him since he felt that the surgeon would end up ordering his own tests (they work at different hospitals).
I think that your neurologist should be able to provide evidence that it wasn't a TIA, based on your ongoing symptoms. The other specialist should be able to confirm the source of your problem.
When I referred to other specialist, I meant to say that you'd probably benefit from seeing an orthopedic specialist, if you haven't already. They would be able to provide you with an accurate diagnosis.