1) stress and sedentary life style
2) peripheral vascular disease (claudication), 3) previous stroke, 4) heavy smoking, 5) high blood pressure, 6) diabetes, 7) high cholesterol, and 8) a family history of heart disease
9) over weight
If you do not have above risk factors, apart from TIA, following condition may also be considered;
1) Bone spur in the neck spine (called as cervical spondylosis).
2) Panic attack.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.