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. 2023 May 26;18(5):e0286409. doi: 10.1371/journal.pone.0286409

Fig 4. Stacked bar graphs with error bars (standard deviation) showing percentage of integrated-electromyography values (iEMG) during 100 ms before the hoof strike, the remaining swing phase, and stance phase.

Fig 4

(a) Forelimb muscle activity (Br, Musculus brachiocephalicus; Inf, M. infraspinatus; TB, long head of M. triceps brachii). (b) Hindlimb muscle activity (GM, M. gluteus medius; ST, M. semitendinosus; FDL, M. flexor digitorum longus). Vertical, dotted, and diagonal lines indicate the 100 ms before the hoof strike, the remaining swing phase, and stance phase, respectively. As the speed increased, the percentage of iEMG during the stance phase decreased in Br, whereas that of iEMG for 100 ms before the hoof strike, increased in TB, GM, and ST. In Inf and FDL, slight increases in the percentage of iEMG for 100 ms before the hoof strike were found.