Compare Two Guidance Techniques for Botulinum Toxin Injections for the Treatment of Limb Spasticity and Focal Dystonia

The purpose of this study is to investigate the use of two ways of locating the muscle for botulinum toxin (BoNT) injection for the treatment of focal hand dystonia and upper limb spasticity located by either electrical stimulation using a needle or ultrasound using sound waves.

The purpose of this study is to compare how the muscle is located by either electrical stimulation using a needle or ultrasound using sound waves.