Journal of Applied Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 76: 2411-2419, 1994;
8750-7587/94 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Garland, S. J.
Right arrow Articles by Robinson, G. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Garland, S. J.
Right arrow Articles by Robinson, G. A.

Journal of Applied Physiology, Vol 76, Issue 6 2411-2419, Copyright © 1994 by American Physiological Society

ARTICLES

Behavior of motor units in human biceps brachii during a submaximal fatiguing contraction

S. J. Garland, R. M. Enoka, L. P. Serrano and G. A. Robinson
Department of Exercise and Sport Sciences, University of Arizona, Tucson 85721.

The activity of 50 single motor units was recorded in the biceps brachii muscle of human subjects while they performed submaximal isometric elbow flexion contractions that were sustained to induce fatigue. The purposes of this study were to examine the influence of fatigue on motor unit threshold force and to determine the relationship between the threshold force of recruitment and the initial interimpulse interval on the discharge rates of single motor units during a fatiguing contraction. The discharge rate of most motor units that were active from the beginning of the contraction declined during the fatiguing contraction, whereas the discharge rates of most newly recruited units were either constant or increased slightly. The absolute threshold forces of recruitment and derecruitment decreased, and the variability of interimpulse intervals increased after the fatigue task. The change in motor unit discharge rate during the fatigue task was related to the initial rate, but the direction of the change in discharge rate could not be predicted from the threshold force of recruitment or the variability in the interimpulse intervals. The discharge rate of most motor units declined despite an increase in the excitatory drive to the motoneuron pool during the fatigue task.


This article has been cited by other articles:


Home page
 J. Neurophysiol.Home page
D. Farina, C. Cescon, F. Negro, and R. M. Enoka
Amplitude Cancellation of Motor-Unit Action Potentials in the Surface Electromyogram Can Be Estimated With Spike-Triggered Averaging
J Neurophysiol, July 1, 2008; 100(1): 431 - 440.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
T. Rudroff, D. Staudenmann, and R. M. Enoka
Electromyographic measures of muscle activation and changes in muscle architecture of human elbow flexors during fatiguing contractions
J Appl Physiol, June 1, 2008; 104(6): 1720 - 1726.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
Z. A. Riley, A. H. Maerz, J. C. Litsey, and R. M. Enoka
Motor unit recruitment in human biceps brachii during sustained voluntary contractions
J. Physiol., April 15, 2008; 586(8): 2183 - 2193.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
M. Klass, M. Levenez, R. M. Enoka, and J. Duchateau
Spinal Mechanisms Contribute to Differences in the Time to Failure of Submaximal Fatiguing Contractions Performed With Different Loads
J Neurophysiol, March 1, 2008; 99(3): 1096 - 1104.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
M. Levenez, S. J. Garland, M. Klass, and J. Duchateau
Cortical and Spinal Modulation of Antagonist Coactivation During a Submaximal Fatiguing Contraction in Humans
J Neurophysiol, February 1, 2008; 99(2): 554 - 563.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. L. Taylor and S. C. Gandevia
A comparison of central aspects of fatigue in submaximal and maximal voluntary contractions
J Appl Physiol, February 1, 2008; 104(2): 542 - 550.
[Abstract] [Full Text] [PDF]

Home page
 Physiol. Rev.Home page
D. G. Allen, G. D. Lamb, and H. Westerblad
Skeletal Muscle Fatigue: Cellular Mechanisms
Physiol Rev, January 1, 2008; 88(1): 287 - 332.
[Abstract] [Full Text] [PDF]

Home page
 Integr. Comp. Biol.Home page
B. K. Barry and R. M. Enoka
The neurobiology of muscle fatigue: 15 years later
Integr. Comp. Biol., October 1, 2007; 47(4): 465 - 473.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Heart Circ. Physiol.Home page
B. C. Thompson, T. Fadia, D. M. Pincivero, and B. W. Scheuermann
Forearm blood flow responses to fatiguing isometric contractions in women and men
Am J Physiol Heart Circ Physiol, July 1, 2007; 293(1): H805 - H812.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
M. W. Bundle, C. L. Ernst, M. J. Bellizzi, S. Wright, and P. G. Weyand
A metabolic basis for impaired muscle force production and neuromuscular compensation during sprint cycling
Am J Physiol Regulatory Integrative Comp Physiol, November 1, 2006; 291(5): R1457 - R1464.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, J. M. Schletty, K. M. Schlachter, E. E. Griffith, A. J. Polichnowski, and A. V. Ng
Active hyperemia and vascular conductance differ between men and women for an isometric fatiguing contraction
J Appl Physiol, July 1, 2006; 101(1): 140 - 150.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, A. Critchlow, and R. M. Enoka
Muscle endurance is greater for old men compared with strength-matched young men
J Appl Physiol, September 1, 2005; 99(3): 890 - 897.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
B.M. Meyers and E. Cafarelli
Caffeine increases time to fatigue by maintaining force and not by altering firing rates during submaximal isometric contractions
J Appl Physiol, September 1, 2005; 99(3): 1056 - 1063.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Levenez, C. Kotzamanidis, A. Carpentier, and J. Duchateau
Spinal reflexes and coactivation of ankle muscles during a submaximal fatiguing contraction
J Appl Physiol, September 1, 2005; 99(3): 1182 - 1188.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
K. S. Maluf and R. M. Enoka
Task failure during fatiguing contractions performed by humans
J Appl Physiol, August 1, 2005; 99(2): 389 - 396.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. Adam and C. J. De Luca
Firing rates of motor units in human vastus lateralis muscle during fatiguing isometric contractions
J Appl Physiol, July 1, 2005; 99(1): 268 - 280.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, A. Critchlow, and R. M. Enoka
Influence of aging on sex differences in muscle fatigability
J Appl Physiol, November 1, 2004; 97(5): 1723 - 1732.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, A. Critchlow, I.-S. Shin, and R. M. Enoka
Men are more fatigable than strength-matched women when performing intermittent submaximal contractions
J Appl Physiol, June 1, 2004; 96(6): 2125 - 2132.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
D. Farina, M. Gazzoni, and F. Camelia
Low-threshold motor unit membrane properties vary with contraction intensity during sustained activation with surface EMG visual feedback
J Appl Physiol, April 1, 2004; 96(4): 1505 - 1515.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
D. Farina, L. Arendt-Nielsen, R. Merletti, and T. Graven-Nielsen
Effect of Experimental Muscle Pain on Motor Unit Firing Rate and Conduction Velocity
J Neurophysiol, March 1, 2004; 91(3): 1250 - 1259.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, A. Critchlow, I.-S. Shin, and R. M. Enoka
Fatigability of the elbow flexor muscles for a sustained submaximal contraction is similar in men and women matched for strength
J Appl Physiol, January 1, 2004; 96(1): 195 - 202.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
L Rochette, S. K. Hunter, N Place, and R Lepers
Activation varies among the knee extensor muscles during a submaximal fatiguing contraction in the seated and supine postures
J Appl Physiol, October 1, 2003; 95(4): 1515 - 1522.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
J. Z. Liu, Z. Y. Shan, L. D. Zhang, V. Sahgal, R. W. Brown, and G. H. Yue
Human Brain Activation During Sustained and Intermittent Submaximal Fatigue Muscle Contractions: An fMRI Study
J Neurophysiol, July 1, 2003; 90(1): 300 - 312.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter, R. Lepers, C. J. MacGillis, and R. M. Enoka
Activation among the elbow flexor muscles differs when maintaining arm position during a fatiguing contraction
J Appl Physiol, June 1, 2003; 94(6): 2439 - 2447.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter and R. M. Enoka
Changes in muscle activation can prolong the endurance time of a submaximal isometric contraction in humans
J Appl Physiol, January 1, 2003; 94(1): 108 - 118.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
S. K. Hunter, D. L. Ryan, J. D. Ortega, and R. M. Enoka
Task Differences With the Same Load Torque Alter the Endurance Time of Submaximal Fatiguing Contractions in Humans
J Neurophysiol, December 1, 2002; 88(6): 3087 - 3096.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
G. P. Pappas, D. S. Asakawa, S. L. Delp, F. E. Zajac, and J. E. Drace
Nonuniform shortening in the biceps brachii during elbow flexion
J Appl Physiol, June 1, 2002; 92(6): 2381 - 2389.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
M. Gorassini, J. F. Yang, M. Siu, and D. J. Bennett
Intrinsic Activation of Human Motoneurons: Reduction of Motor Unit Recruitment Thresholds by Repeated Contractions
J Neurophysiol, April 1, 2002; 87(4): 1859 - 1866.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. K. Hunter and R. M. Enoka
Sex differences in the fatigability of arm muscles depends on absolute force during isometric contractions
J Appl Physiol, December 1, 2001; 91(6): 2686 - 2694.
[Abstract] [Full Text] [PDF]

Home page
 Physiol. Rev.Home page
S. C. Gandevia
Spinal and Supraspinal Factors in Human Muscle Fatigue
Physiol Rev, October 1, 2001; 81(4): 1725 - 1789.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
G. P. Pappas, E. W. Olcott, and J. E. Drace
Imaging of skeletal muscle function using 18FDG PET: force production, activation, and metabolism
J Appl Physiol, January 1, 2001; 90(1): 329 - 337.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
J. G. Semmler, D. V. Kutzscher, and R. M. Enoka
Gender Differences in the Fatigability of Human Skeletal Muscle
J Neurophysiol, December 1, 1999; 82(6): 3590 - 3593.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
E. S. Luschei, L. O. Ramig, K. L. Baker, and M. E. Smith
Discharge Characteristics of Laryngeal Single Motor Units During Phonation in Young and Older Adults and in Persons With Parkinson Disease
J Neurophysiol, May 1, 1999; 81(5): 2131 - 2139.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
L. Griffin, S. J. Garland, and T. Ivanova
Discharge patterns in human motor units during fatiguing arm movements
J Appl Physiol, November 1, 1998; 85(5): 1684 - 1692.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. D. Road and A. M. Cairns
Phrenic motoneuron firing rates before, during, and after prolonged inspiratory resistive loading
J Appl Physiol, September 1, 1997; 83(3): 776 - 783.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online