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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Spasm and flexion-relaxation phenomenon response to large lifting load during the performance of a trunk flexion-extension exercise

Fig. 2

Two samples (JW and HL) of bilateral EMG recordings from ES during flexion-extension performance with large lifting load condition, respectively. During relaxation period in 15 kg condition, subject JW shows some spasms in a form of low amplitude with sustained discharge mainly on left ES while HL having no spasms. In 20 kg condition, JW shows some spasms in form of sporadic potential discharge mainly on left ES while HL having a little spasm. In 25 kg, both JW and HL shows the spasms obviously triggered with sporadic large amplitude action potential discharge bilaterally. The vertical parallel dotted lines represent EMG-off (left red) and EMG-on (right red) timing

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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