Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament rupture

Yu Konishi, Toshiaki Oda, Satoshi Tsukazaki, Ryuta Kinugasa, Norikazu Hirose, Toru Fukubayashi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Purpose: The purpose of this study was to obtain evidence to support the hypothesis that motor unit recruitment is reduced in the quadriceps femoris (QF) of patients with ACL rupture. Methods: We compared muscle torque per unit volume in the QF from injured and uninjured sides to normal subjects. If high-threshold motor unit recruitment is reduced in patients with ACL rupture, this reduction will theoretically lead to a reduction in muscle torque per unit volume compared to the control group. The subjects included 22 patients with ACL rupture and 22 subjects with no history of knee injury. To identify the muscle torque per unit volume, the isokinetic peak torque was divided by QF volume which was obtained by MRI. Results: Tests revealed that the mean muscle torque per unit volume of the uninjured and injured sides was significantly lower than those of the control group. Conclusion: This study demonstrated that the values of the muscle torque per unit volume of both injured and uninjured sides of patients with ACL rupture were significantly lower than those of the control group, thereby providing indirect evidence of the hindrance of motor unit recruitment in these patients. The results of the present study also indicate that there may be bilateral QF weakness in patients with ACL rupture. Since persistent QF weakness is a significant barrier to effective rehabilitation in patients with ACL injuries, a better understanding of the underlying mechanisms will allow clinicians and scientists to develop more effective therapeutic strategies for patient rehabilitation.

Original languageEnglish
Pages (from-to)641-645
Number of pages5
JournalKnee Surgery, Sports Traumatology, Arthroscopy
Volume19
Issue number4
DOIs
Publication statusPublished - 2011 Apr

Fingerprint

Anterior Cruciate Ligament
Quadriceps Muscle
Torque
Rupture
Muscles
Neurophysiological Recruitment
Control Groups
Rehabilitation
Knee Injuries

Keywords

  • Anterior cruciate ligament rupture
  • Muscle volume
  • Quadriceps femoris weakness
  • Torque

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament rupture. / Konishi, Yu; Oda, Toshiaki; Tsukazaki, Satoshi; Kinugasa, Ryuta; Hirose, Norikazu; Fukubayashi, Toru.

In: Knee Surgery, Sports Traumatology, Arthroscopy, Vol. 19, No. 4, 04.2011, p. 641-645.

Research output: Contribution to journalArticle

Konishi, Yu ; Oda, Toshiaki ; Tsukazaki, Satoshi ; Kinugasa, Ryuta ; Hirose, Norikazu ; Fukubayashi, Toru. / Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament rupture. In: Knee Surgery, Sports Traumatology, Arthroscopy. 2011 ; Vol. 19, No. 4. pp. 641-645.
@article{db9cc69782fe4186bd85dd4cef7a5d2f,
title = "Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament rupture",
abstract = "Purpose: The purpose of this study was to obtain evidence to support the hypothesis that motor unit recruitment is reduced in the quadriceps femoris (QF) of patients with ACL rupture. Methods: We compared muscle torque per unit volume in the QF from injured and uninjured sides to normal subjects. If high-threshold motor unit recruitment is reduced in patients with ACL rupture, this reduction will theoretically lead to a reduction in muscle torque per unit volume compared to the control group. The subjects included 22 patients with ACL rupture and 22 subjects with no history of knee injury. To identify the muscle torque per unit volume, the isokinetic peak torque was divided by QF volume which was obtained by MRI. Results: Tests revealed that the mean muscle torque per unit volume of the uninjured and injured sides was significantly lower than those of the control group. Conclusion: This study demonstrated that the values of the muscle torque per unit volume of both injured and uninjured sides of patients with ACL rupture were significantly lower than those of the control group, thereby providing indirect evidence of the hindrance of motor unit recruitment in these patients. The results of the present study also indicate that there may be bilateral QF weakness in patients with ACL rupture. Since persistent QF weakness is a significant barrier to effective rehabilitation in patients with ACL injuries, a better understanding of the underlying mechanisms will allow clinicians and scientists to develop more effective therapeutic strategies for patient rehabilitation.",
keywords = "Anterior cruciate ligament rupture, Muscle volume, Quadriceps femoris weakness, Torque",
author = "Yu Konishi and Toshiaki Oda and Satoshi Tsukazaki and Ryuta Kinugasa and Norikazu Hirose and Toru Fukubayashi",
year = "2011",
month = "4",
doi = "10.1007/s00167-010-1324-9",
language = "English",
volume = "19",
pages = "641--645",
journal = "Knee Surgery, Sports Traumatology, Arthroscopy",
issn = "0942-2056",
publisher = "Springer Verlag",
number = "4",

}

TY - JOUR

T1 - Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament rupture

AU - Konishi, Yu

AU - Oda, Toshiaki

AU - Tsukazaki, Satoshi

AU - Kinugasa, Ryuta

AU - Hirose, Norikazu

AU - Fukubayashi, Toru

PY - 2011/4

Y1 - 2011/4

N2 - Purpose: The purpose of this study was to obtain evidence to support the hypothesis that motor unit recruitment is reduced in the quadriceps femoris (QF) of patients with ACL rupture. Methods: We compared muscle torque per unit volume in the QF from injured and uninjured sides to normal subjects. If high-threshold motor unit recruitment is reduced in patients with ACL rupture, this reduction will theoretically lead to a reduction in muscle torque per unit volume compared to the control group. The subjects included 22 patients with ACL rupture and 22 subjects with no history of knee injury. To identify the muscle torque per unit volume, the isokinetic peak torque was divided by QF volume which was obtained by MRI. Results: Tests revealed that the mean muscle torque per unit volume of the uninjured and injured sides was significantly lower than those of the control group. Conclusion: This study demonstrated that the values of the muscle torque per unit volume of both injured and uninjured sides of patients with ACL rupture were significantly lower than those of the control group, thereby providing indirect evidence of the hindrance of motor unit recruitment in these patients. The results of the present study also indicate that there may be bilateral QF weakness in patients with ACL rupture. Since persistent QF weakness is a significant barrier to effective rehabilitation in patients with ACL injuries, a better understanding of the underlying mechanisms will allow clinicians and scientists to develop more effective therapeutic strategies for patient rehabilitation.

AB - Purpose: The purpose of this study was to obtain evidence to support the hypothesis that motor unit recruitment is reduced in the quadriceps femoris (QF) of patients with ACL rupture. Methods: We compared muscle torque per unit volume in the QF from injured and uninjured sides to normal subjects. If high-threshold motor unit recruitment is reduced in patients with ACL rupture, this reduction will theoretically lead to a reduction in muscle torque per unit volume compared to the control group. The subjects included 22 patients with ACL rupture and 22 subjects with no history of knee injury. To identify the muscle torque per unit volume, the isokinetic peak torque was divided by QF volume which was obtained by MRI. Results: Tests revealed that the mean muscle torque per unit volume of the uninjured and injured sides was significantly lower than those of the control group. Conclusion: This study demonstrated that the values of the muscle torque per unit volume of both injured and uninjured sides of patients with ACL rupture were significantly lower than those of the control group, thereby providing indirect evidence of the hindrance of motor unit recruitment in these patients. The results of the present study also indicate that there may be bilateral QF weakness in patients with ACL rupture. Since persistent QF weakness is a significant barrier to effective rehabilitation in patients with ACL injuries, a better understanding of the underlying mechanisms will allow clinicians and scientists to develop more effective therapeutic strategies for patient rehabilitation.

KW - Anterior cruciate ligament rupture

KW - Muscle volume

KW - Quadriceps femoris weakness

KW - Torque

UR - http://www.scopus.com/inward/record.url?scp=79952993830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952993830&partnerID=8YFLogxK

U2 - 10.1007/s00167-010-1324-9

DO - 10.1007/s00167-010-1324-9

M3 - Article

VL - 19

SP - 641

EP - 645

JO - Knee Surgery, Sports Traumatology, Arthroscopy

JF - Knee Surgery, Sports Traumatology, Arthroscopy

SN - 0942-2056

IS - 4

ER -