Table 7

Features of multiple sclerosis (MS) tremor

  • 57% of definite clinic based MS cases have tremor

  • Parts of body affected by tremor in MS:

    • 55% arms

    • 8% legs

    • 7% head

    • 5% trunk

  • Invariably an action tremor, with several distinct subtypes

  • Mean duration from MS to tremor onset of 13.5 years

  • Tremulous patients more likely to have progressive MS

  • 27% of MS patients report tremor related disability

  • 10% of MS patients have incapacitating tremor

  • Tremor severity correlated with:

    • dysarthria

    • dysmetria

    • walking time (inverse correlation)