title: Torque-based triggering improves stimulus timing precision in activation tests.
abstract: The aim of this study was to assess whether automated torque-based stimulator triggering could improve precision in delivering stimuli near peak torque during voluntary activation tests. The quadriceps activation test was used as a test model in 11 volunteers. Automated torque-based triggering reduced stimulus delivery timing errors by 75% when compared with conventional automated time-based triggering. Torque-based stimulator triggering is recommended as an alternative to automated time-based triggering in voluntary activation tests, as it improves stimulus timing precision and thereby reduces measurement error.
authors.affiliation: Graduate Program in Physical Therapy and Rehabilitation Science, Musculoskeletal Biomechanics and Sports Medicine Research Laboratory, Carver College of Medicine, University of Iowa, Iowa City, Iowa 52242-1190, USA.
authors.forename: Chandramouli
authors.initials: C
authors.lastname: Krishnan
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Allen
authors.forename: Glenn N
authors.initials: GN
authors.lastname: Williams
mesh_terms: D001331:Automation / Q000379:methods; D004558:Electric Stimulation / Q000295:instrumentation*; D004576:Electromyography / Q000379:methods; D015444:Exercise / Q000502:physiology; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D018709:Statistics, Nonparametric; D013997:Time Factors; D019415:Torque