Tremor is the rhythmic shaking of a body part and is a common and disabling problem seen in diseases such as Parkinson’s disease and Essential Tremor. At present there is no single diagnostic test to determine the cause of a person’s tremor. This project aims to combine the use of sensors that measure tremor and muscle activity with clinical assessment to develop new tests for reliably diagnosing and monitoring tremor, a key step to treating patients correctly and conducting future drug trials.