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. 2022 Sep 22;10(4):311–323. doi: 10.1007/s40141-022-00368-1

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© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2022, Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

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Fig. 1 — Dynamic poly-electromyographic recordings of a patient with Lance-Adams syndrome while standing shows alternating positive and negative myoclonus leading to “bouncing” as well as a prolonged period of negative myoclonus (noted by the arrow) leading to a “drop attack.” Right (R), left (L), medial hamstrings (MH), rectus femoris (RF), vastus lateralis (VL), lateral gastrocnemius (LG), and tibialis anterior (TA). Data collected in the MossRehab Sheer Gait and Motion Analysis Laboratory