Muscle spindle activity in man during shortening and lengthening contractions

The Journal of Physiology
D BurkeL Löfstedt

Abstract

1. The responses of forty-one muscle spindle endings, mostly in tibialis anterior, were studied in human subjects during voluntary movements of the ankle joint performed at various speeds against different external loads. 2. During slow shortening contractions, the discharge rates of spindle endings in the contracting muscle accelerated after the appearance of the first e.m.g. potentials but before sufficient force had been generated to move the limb. With some endings, the discharge rate decreased during the shortening movement while the e.m.g. activity was increasing, but it always remained higher than before the onset of contraction. If the speed of the movement was increased fewer spindle discharges were seen during muscle shortening. If the shortening contraction was opposed by an external load, so that greater effort was required to perform the same movement, more discharges were seen and the discharge pattern became less modulated by the change in muscle length. 3. These findings indicate that during shortening contractions the fusimotor system is activated together with the skeletomotor system. However, the fusimotor drive is generally insufficient to maintain a significant spindle discharge unless movement is slow or t...Continue Reading

Citations

Dec 3, 2013·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Minki SinNam-Jong Paik
Dec 3, 2013·Journal of Computational Neuroscience·Bernard Grandjean, Marc A Maier
Nov 13, 2004·Experimental Brain Research·P MarqueV Marchand-Pauvert
Jan 1, 1979·Progress in Neurobiology·W A MacKay, J T Murphy
Nov 20, 1998·Perception & Psychophysics·S R GarrettM T Turvey
Jan 1, 1996·European Journal of Applied Physiology and Occupational Physiology·J AvelaP V Komi
Dec 7, 2007·Journal of Motor Behavior·David N SuprakAndrew R Karduna
Mar 1, 1991·Acta Physiologica Scandinavica·N A al-FalaheA B Vallbo
Feb 21, 2006·Experimental Brain Research·John G SemmlerRoger M Enoka
Jan 1, 1990·Experimental Brain Research·J T Inglis, J S Frank
Mar 15, 2008·Experimental Brain Research·Caroline IglesiasVéronique Marchand-Pauvert
Dec 5, 2000·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·M D BishopT W Kaminski
Apr 20, 2004·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·J R Potvin, S H M Brown
May 22, 1998·Neuroscience and Biobehavioral Reviews·P Crenna
Nov 8, 2007·The International Journal of Neuroscience·Hye-Seon JeonFloyd J Thompson
Mar 27, 2001·The International Journal of Neuroscience·M H Trimble, D M Koceja
Feb 21, 2016·Ultrasound in Medicine & Biology·Wolbert van den HoornPaul W Hodges
Oct 16, 2001·The Journal of Physiology·K E JonesA B Vallbo
Jun 5, 2003·Perceptual and Motor Skills·Katsuo FujiwaraKatsumi Inoue
Oct 2, 2001·The Journal of Physiology·P MarqueE Pierrot-Deseilligny
Feb 5, 2002·The Journal of Physiology·Benjamin Mattei, Annie Schmied
Nov 10, 1998·The Journal of Physiology·N Kakuda, M Nagaoka
Oct 9, 1998·The Journal of Physiology·S C GandeviaJ B Leeper
Oct 9, 2013·The Journal of Physiology·Lee D WalshSimon C Gandevia
Nov 29, 2002·The Journal of Physiology·John G SemmlerRoger M Enoka
Oct 29, 2008·The Journal of Physiology·Jacques Duchateau, Roger M Enoka
Sep 26, 2013·The Journal of Physiology·Martin E HérouxSimon C Gandevia
Mar 3, 2007·The Journal of Physiology·Michael J GreyThomas Sinkjaer
Apr 30, 2005·The Journal of Physiology·Véronique Marchand-PauvertEmmanuel Pierrot-Deseilligny
Jan 17, 2013·Neuroscience·V A SelionovY P Ivanenko
Jan 3, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Jane E ButlerJanet L Taylor
Jun 17, 2008·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Julien DuclayAlain Martin

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