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Segment 1: Continuous, irregular adduction of the right ring finger at rest and pronounced during posture. Segment 2: EMG of the right second palmar interosseous muscle (SPI) at rest showing irregular bursts of normally configured motor potentials. Segment 3: Ultrasonography of the fourth (left side) and third (right side) interosseous space confirms predominant involvement of the second palmar interosseous muscle (SPI). Segment 4: Cessation of myoclonic jerks in the ring finger after the first botulinum toxin injection but tonic adduction of the fifth finger. (MPG 8.99 mb)
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Schramm, A., Cursiefen, S. & Schröder, R. Isolated ring-finger myoclonus. J Neurol 258, 1164–1165 (2011). https://doi.org/10.1007/s00415-010-5827-6
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DOI: https://doi.org/10.1007/s00415-010-5827-6