Rapid tremor frequency assessment with the iPhone accelerometer

Research output: Contribution to journalArticlepeer-review


  • Raed A Joundi
  • John-Stuart Brittain
  • Ned Jenkinson
  • Alexander L Green
  • Tipu Aziz

Colleges, School and Institutes

External organisations

  • Department of Physiology, Anatomy, and Genetics, Oxford University, UK. raed.joundi@magd.ox.ac.uk


The physician is often seeking more efficient ways of performing patient assessments. Currently, measuring tremor frequency requires expensive and bulky equipment. We propose the use of the in-built accelerometer of the iPhone via the iSeismo application for rapid measurement of tremor frequency. We use this device in a series of 7 different tremor cases, and show that the frequency measurements on the iSeismo graph closely match the more sophisticated EMG analysis during tremor. This is a preliminary confirmation of the usefulness of this device in the clinical setting for quick assessment of the dominant frequency component in a variety of tremors.


Original languageEnglish
Pages (from-to)288-90
Number of pages3
JournalParkinsonism and Related Disorders
Issue number4
Publication statusPublished - May 2011


  • Acceleration, Adult, Aged, Cell Phones, Electrodiagnosis, Female, Humans, Male, Tremor, Clinical Trial, Journal Article, Research Support, Non-U.S. Gov't