title: Laser Doppler vibrometry measurement of the mechanical myogram.
abstract: Contracting muscles show complex dimensional changes that include lateral expansion. Because this expansion process is intrinsically vibrational, driven by repetitive actions of multiple motor units, it can be sensed and quantified using the method of Laser Doppler Vibrometry (LDV). LDV has a number of advantages over more traditional mechanical methods based on microphones and accelerometers. The LDV mechanical myogram from a small hand muscle (the first dorsal interosseous) was studied under conditions of elastic loading applied to the tip of the abducted index finger. The LDV signal was shown to be related systematically to the level of force production, and to compare favorably with conventional methods for sensing the mechanical and electrical aspects of muscle contraction.
authors.affiliation: Washington University School of Medicine, 4625 Lindell Blvd., Suite 200, Saint Louis, Missouri 63108, USA.
authors.forename: John W
authors.initials: JW
authors.lastname: Rohrbaugh
authors.affiliation: Washington University School of Medicine, 4625 Lindell Blvd., Suite 200, Saint Louis, Missouri 63108, USA.
authors.forename: Erik J
authors.initials: EJ
authors.lastname: Sirevaag
authors.affiliation: Washington University School of Engineering, 1 Brookings Ave., Saint Louis, Missouri 63110, USA.
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Richter
mesh_terms: D000293:Adolescent; D000328:Adult; D004548:Elasticity; D005260:Female; D005385:Fingers / Q000502:physiology; D006801:Humans; D007834:Lasers; D008297:Male; D009068:Movement; D009119:Muscle Contraction; D009213:Myography / Q000295:instrumentation*; D014732:Vibration; D055815:Young Adult