It is sometimes difficult, even for a trained neurologist, to tell the difference between Parkinson’s disease and essential tremor when it is in the early stages, as they can share similar symptoms (such as resting tremor). A new Taiwan-based study investigated changes in brain volume in people with essential tremor and Parkinson’s disease, searching for a pattern that might help differentiate between to the two conditions more easily.
The study found that although both ET and PD patients showed a decrease in brain volume in areas involved with movement and muscle control, it also showed increases in other distinct areas. Researchers speculate that this is due to the ability of the brain to compensate for damaged areas by developing and strengthening new pathways, thus increasing the size of those areas.
Although further study is needed, it appears that looking specifically at the areas of the brain that increase in volume, along with other diagnostic and assessment tools, may allow physicians to more accurately differentiate between ET and PD.