Do these twitches occur before, during or after activity?
Do you have any other problems?
What investigations has your doctor done?
Has he given these twitches a name?
There are a number of reasons for twitching and there are several types of twitching. If your doctor has not given these a name such as fasciculations, tics or chorea (for example) then you should be referred to a neurologist who is more familiar with these in order to get an accurate diagnosis.
The majority of fasciculations (small muscle twitches) are benign and can occur with dehydration or magnesium deficiency as well as when a patient is fatigued or has been over exerting the group of muscles. However there are rarely more serious causes of fasciculations and although you do not have any symptoms, it is worth getting a proper assessment so that you have an understanding of the problem.
A neurologist will do some simple muscle strength and sensation testing to find out what sort of problem might be present and from there discuss what treatment if any. It may be as simple as improving your diet and fluid intake however as it has gone on for 11 months without a proper assessment then a referral is reasonable at this point.