Physiological alterations of maximal voluntary quadriceps activation by changes of knee joint angle
The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 hea...
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| Published in | Muscle & nerve Vol. 24; no. 5; pp. 667 - 672 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
New York
John Wiley & Sons, Inc
01.05.2001
Wiley |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0148-639X 1097-4598 |
| DOI | 10.1002/mus.1053 |
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| Abstract | The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 healthy subjects in 5° intervals between 30° and 90° of knee joint flexion. Superimposed twitches at maximal voluntary contraction (MVC) and at a level of 60% and 40% of the MVC were applied and the voluntary activation estimated. At between 30° and 75° of knee flexion, the maximal extension torque increased at an average rate of 2.67 ± 0.6 Nm/degree, followed by a decline with further flexion. However, throughout the joint‐angle range tested, voluntary activation increased on average by 0.37%/degree with a maximum at 90° of flexion. Due to the influence of joint position it is not possible to generalize results obtained at the knee joint angle of 90° of flexion, which is usually used for the quadriceps twitch‐interpolation technique. Consequently, it is useful to investigate voluntary activation deficits in knee joint disorders at a range of knee joint angles that includes, in particular, the more extended joint angles used frequently during daily activity. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 667–672, 2001 |
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| AbstractList | The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 healthy subjects in 5 degrees intervals between 30 degrees and 90 degrees of knee joint flexion. Superimposed twitches at maximal voluntary contraction (MVC) and at a level of 60% and 40% of the MVC were applied and the voluntary activation estimated. At between 30 degrees and 75 degrees of knee flexion, the maximal extension torque increased at an average rate of 2.67 +/- 0.6 Nm/degree, followed by a decline with further flexion. However, throughout the joint-angle range tested, voluntary activation increased on average by 0.37%/degree with a maximum at 90 degrees of flexion. Due to the influence of joint position it is not possible to generalize results obtained at the knee joint angle of 90 degrees of flexion, which is usually used for the quadriceps twitch-interpolation technique. Consequently, it is useful to investigate voluntary activation deficits in knee joint disorders at a range of knee joint angles that includes, in particular, the more extended joint angles used frequently during daily activity. The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 healthy subjects in 5° intervals between 30° and 90° of knee joint flexion. Superimposed twitches at maximal voluntary contraction (MVC) and at a level of 60% and 40% of the MVC were applied and the voluntary activation estimated. At between 30° and 75° of knee flexion, the maximal extension torque increased at an average rate of 2.67 ± 0.6 Nm/degree, followed by a decline with further flexion. However, throughout the joint‐angle range tested, voluntary activation increased on average by 0.37%/degree with a maximum at 90° of flexion. Due to the influence of joint position it is not possible to generalize results obtained at the knee joint angle of 90° of flexion, which is usually used for the quadriceps twitch‐interpolation technique. Consequently, it is useful to investigate voluntary activation deficits in knee joint disorders at a range of knee joint angles that includes, in particular, the more extended joint angles used frequently during daily activity. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 667–672, 2001 The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 healthy subjects in 5 degrees intervals between 30 degrees and 90 degrees of knee joint flexion. Superimposed twitches at maximal voluntary contraction (MVC) and at a level of 60% and 40% of the MVC were applied and the voluntary activation estimated. At between 30 degrees and 75 degrees of knee flexion, the maximal extension torque increased at an average rate of 2.67 +/- 0.6 Nm/degree, followed by a decline with further flexion. However, throughout the joint-angle range tested, voluntary activation increased on average by 0.37%/degree with a maximum at 90 degrees of flexion. Due to the influence of joint position it is not possible to generalize results obtained at the knee joint angle of 90 degrees of flexion, which is usually used for the quadriceps twitch-interpolation technique. Consequently, it is useful to investigate voluntary activation deficits in knee joint disorders at a range of knee joint angles that includes, in particular, the more extended joint angles used frequently during daily activity.The purpose of this study was to investigate the influence of different angles of the knee joint on voluntary activation of the quadriceps muscle, estimating the ability of a subject to activate a muscle maximally by means of voluntary contraction. Isometric torque measurement was performed on 6 healthy subjects in 5 degrees intervals between 30 degrees and 90 degrees of knee joint flexion. Superimposed twitches at maximal voluntary contraction (MVC) and at a level of 60% and 40% of the MVC were applied and the voluntary activation estimated. At between 30 degrees and 75 degrees of knee flexion, the maximal extension torque increased at an average rate of 2.67 +/- 0.6 Nm/degree, followed by a decline with further flexion. However, throughout the joint-angle range tested, voluntary activation increased on average by 0.37%/degree with a maximum at 90 degrees of flexion. Due to the influence of joint position it is not possible to generalize results obtained at the knee joint angle of 90 degrees of flexion, which is usually used for the quadriceps twitch-interpolation technique. Consequently, it is useful to investigate voluntary activation deficits in knee joint disorders at a range of knee joint angles that includes, in particular, the more extended joint angles used frequently during daily activity. |
| Author | Awiszus, Friedemann Becker, Roland |
| Author_xml | – sequence: 1 givenname: Roland surname: Becker fullname: Becker, Roland email: roland.becker@medizin.uni-magdeburg.de organization: Neuromuscular Research Group, Department of Orthopedics, Otto von Guericke University, Leipziger Strasse 45, 39120 Magdeburg, Germany – sequence: 2 givenname: Friedemann surname: Awiszus fullname: Awiszus, Friedemann organization: Neuromuscular Research Group, Department of Orthopedics, Otto von Guericke University, Leipziger Strasse 45, 39120 Magdeburg, Germany |
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| Keywords | Osteoarticular system Knee Human Body movement Lower limb Quadriceps muscle Joint Voluntary movement Muscle contraction Motor control |
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An in vitro study performed with a new experimental technique publication-title: J Bone Jt Surg doi: 10.2106/00004623-199072040-00014 – ident: e_1_2_7_17_2 doi: 10.1007/BF00422470 – volume: 101 start-page: 25 year: 1984 ident: e_1_2_7_11_2 article-title: The mammalian muscle spindle and its central control publication-title: Rev Physiol Biochem Pharmacol – ident: e_1_2_7_8_2 doi: 10.1016/0021-9290(92)90288-C – ident: e_1_2_7_24_2 doi: 10.1046/j.1365-2281.1997.05555.x – ident: e_1_2_7_3_2 doi: 10.1016/0021-9290(88)90187-X – volume: 2 start-page: 163 year: 1989 ident: e_1_2_7_22_2 article-title: Ligamentous knee injuries and muscle inhibition publication-title: J Orthop Rheumatol – ident: e_1_2_7_25_2 doi: 10.1136/jnnp.49.11.1288 – ident: e_1_2_7_27_2 doi: 10.1097/00005768-199912000-00001 – volume: 39 start-page: 58 year: 1987 ident: e_1_2_7_12_2 article-title: The role of muscle spindle receptors and fusimotor neurones in the control of movement publication-title: Electroencephalogr Clin Neurophysiol – volume: 23 start-page: 328 year: 1996 ident: e_1_2_7_28_2 article-title: Isometric strength measurements of knee extensors in women with osteoarthritis of the knee publication-title: J Rheumatol – ident: e_1_2_7_19_2 doi: 10.3109/17453676808989453 – ident: e_1_2_7_2_2 doi: 10.1023/A:1005585030764 – ident: e_1_2_7_7_2 doi: 10.1016/0165-0270(88)90145-8 – ident: e_1_2_7_15_2 doi: 10.1093/rheumatology/32.2.127 – ident: e_1_2_7_21_2 doi: 10.1113/jphysiol.1954.sp005070 – volume: 268 start-page: 161 year: 1991 ident: e_1_2_7_18_2 article-title: A sensory role for the cruciate ligaments publication-title: Clin Orthop – volume: 160 start-page: 79 year: 1988 ident: e_1_2_7_5_2 article-title: The range of sarcomere lengths in the muscles of the human lower limb publication-title: J Anat – ident: e_1_2_7_14_2 doi: 10.1042/cs0860305 – ident: e_1_2_7_16_2 doi: 10.1093/ageing/27.1.55 – ident: e_1_2_7_26_2 doi: 10.1042/cs0670007 – ident: e_1_2_7_9_2 doi: 10.1007/BF00580860 – ident: e_1_2_7_10_2 doi: 10.1002/jor.1100020108 – volume: 71 start-page: 2122 year: 1991 ident: e_1_2_7_23_2 article-title: Voluntary activation of human quadriceps during and after isokinetic exercise publication-title: J Appl Physiol doi: 10.1152/jappl.1991.71.6.2122 – ident: e_1_2_7_6_2 doi: 10.1113/jphysiol.1966.sp007909 – ident: e_1_2_7_4_2 doi: 10.1007/BF00376464 – ident: e_1_2_7_13_2 doi: 10.1016/S0889-857X(05)70068-5 |
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| SubjectTerms | Adult Biological and medical sciences Fundamental and applied biological sciences. Psychology Humans Isometric Contraction - physiology Knee Joint - physiology knee joint angle Male Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration Muscle Contraction - physiology Muscle, Skeletal - physiology quadriceps muscle twitch-interpolation technique Vertebrates: nervous system and sense organs voluntary activation |
| Title | Physiological alterations of maximal voluntary quadriceps activation by changes of knee joint angle |
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