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1. Since examination [neurologist] and investigation [MRI] is done, and there is nothing to be evaluated as told by your doctor, thus AGE [which is not mentioned] could be a contributory/provoking factor. [some people get this with age] probably senile/
essential tremor [ET]
2. since MRI revealed nothing conclusive thus, shaking due to parkinsonism, multiple
sclerosis or
cerebellar disease can be excluded.
3. make sure to check with values of blood urea and liver function tests for any hepatic disorder or other metabolic abnormalities.
4. make sure it is not due to alcohol/drug withdrawal?
5. Drugs used to treat ET, also increases the risk of
depression, and since ET is not a life threatening disorder, unless ADL [activities of daily living] like writing/ eating/dancing becomes difficult or it causes
disability, so one should check periodically with Neurologist for progression of disease or contact Physiotherapist/ Occupational Trainer.
6. since shaking [tremors] are due to problem in the brain, thus strengthening of neck muscles is of very less advantage. [strengthening is advisable to prevent reoccurence of injury] which is not there.