Sometimes. Parkinson disease is the most common cause of parkinsonism, a symptomatic triad of tremor, muscular rigidity, and slow movement. Most of parkinson disease is caused by contributions of multiple genes, no one of which is necessary nor sufficient, aided by poorly defined environmental factors. About seven types of parkinson disease are inherited in an autosomal dominant or recessive pattern.
Yes & more to learn. Current thought says many factors are involved. Pd is more common in areas with high agricultural chemical use & in those working with heavy metals or toxic chemicals. We also know that genetics are involved with several identified mutations causing higher susceptibility & rare families with dominantly inherited pd. I believe the key & cure of pd will be found using genetic therapy breakthroughs.
Parkinson. Despite a good deal of investigation so far there is no known causes of Parkinson's except for those drug induced. So until the source is found the concept of prevention remains remote.
Surgical? Essentially there are medications and surgery. Surgical treatment would likely consist of deep brain stimulation or dbs but, you should confirm this with a neurologist and a neurosurgeon.