Common risk factors in the development and progression of<unk><unk><unk>  largely remain unknown. 
Other common risk factors associated include: Age, Smoking, oxidative stress.
Amyotrophic lateral sclerosis risk factors
Ataxia risk factors
Transient ischemic attack risk factors
Myasthenia gravis risk factors
Fragile X syndrome risk factors
Parkinson's disease risk factors
Migraine risk factors
Spinal muscular atrophy risk factor