Exercise-enhanced MR imaging of variations in forearm muscle anatomy and use

Importance in MR spectroscopy

J. L. Fleckenstein, L. A. Bertocci, R. L. Nunnally, R. W. Parkey, Ronald M Peshock

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

31P MR spectroscopic studies of forearm exercise frequently assume that the volume sampled is appropriate for the muscle of interest and that individual variations in muscle anatomy and use are not important. Postexercise MR imaging was used to assess variations in the size, location, and use of forearm flexors and the accuracy of palpation as a method for locating the muscle of interest. By using the information obtained with MR, the effects of errors in surface-coil position relative to the muscle of interest on 31P MR spectroscopy were examined. In the midforearm of seven men, the greatest diameter of the flexor carpi ulnaris was 29 ± 4 mm, and that of the flexor digitorum superficialis was 28 ± 6 mm. However, in the proximal forearm, 58 ± 10% of the diameter was covered by the palmaris longus, when present (79% of subjects). An unexpected finding was that a focal portion of the superficial finger flexor was used primarily as a wrist flexor in 26% of subjects. Palpation incorrectly identified flexor muscle margins by more than 15 mm in 50% of attempts. When a surface coil was positioned over wrist flexors during handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-enhanced MR imaging reveals variations in forearm muscle anatomy and use that are common and difficult to appreciable by palpation. It therefore allows improved localization of the sensitive volume of MR spectroscopic studies of muscle physiology.

Original languageEnglish (US)
Pages (from-to)693-698
Number of pages6
JournalAmerican Journal of Roentgenology
Volume153
Issue number4
StatePublished - 1989

Fingerprint

Forearm
Anatomy
Magnetic Resonance Spectroscopy
Exercise
Muscles
Palpation
Wrist
Fingers

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Exercise-enhanced MR imaging of variations in forearm muscle anatomy and use : Importance in MR spectroscopy. / Fleckenstein, J. L.; Bertocci, L. A.; Nunnally, R. L.; Parkey, R. W.; Peshock, Ronald M.

In: American Journal of Roentgenology, Vol. 153, No. 4, 1989, p. 693-698.

Research output: Contribution to journalArticle

Fleckenstein, J. L. ; Bertocci, L. A. ; Nunnally, R. L. ; Parkey, R. W. ; Peshock, Ronald M. / Exercise-enhanced MR imaging of variations in forearm muscle anatomy and use : Importance in MR spectroscopy. In: American Journal of Roentgenology. 1989 ; Vol. 153, No. 4. pp. 693-698.
@article{898ac21a3b7a48408fbc4fa0833f9be9,
title = "Exercise-enhanced MR imaging of variations in forearm muscle anatomy and use: Importance in MR spectroscopy",
abstract = "31P MR spectroscopic studies of forearm exercise frequently assume that the volume sampled is appropriate for the muscle of interest and that individual variations in muscle anatomy and use are not important. Postexercise MR imaging was used to assess variations in the size, location, and use of forearm flexors and the accuracy of palpation as a method for locating the muscle of interest. By using the information obtained with MR, the effects of errors in surface-coil position relative to the muscle of interest on 31P MR spectroscopy were examined. In the midforearm of seven men, the greatest diameter of the flexor carpi ulnaris was 29 ± 4 mm, and that of the flexor digitorum superficialis was 28 ± 6 mm. However, in the proximal forearm, 58 ± 10{\%} of the diameter was covered by the palmaris longus, when present (79{\%} of subjects). An unexpected finding was that a focal portion of the superficial finger flexor was used primarily as a wrist flexor in 26{\%} of subjects. Palpation incorrectly identified flexor muscle margins by more than 15 mm in 50{\%} of attempts. When a surface coil was positioned over wrist flexors during handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-enhanced MR imaging reveals variations in forearm muscle anatomy and use that are common and difficult to appreciable by palpation. It therefore allows improved localization of the sensitive volume of MR spectroscopic studies of muscle physiology.",
author = "Fleckenstein, {J. L.} and Bertocci, {L. A.} and Nunnally, {R. L.} and Parkey, {R. W.} and Peshock, {Ronald M}",
year = "1989",
language = "English (US)",
volume = "153",
pages = "693--698",
journal = "American Journal of Roentgenology",
issn = "0361-803X",
publisher = "American Roentgen Ray Society",
number = "4",

}

TY - JOUR

T1 - Exercise-enhanced MR imaging of variations in forearm muscle anatomy and use

T2 - Importance in MR spectroscopy

AU - Fleckenstein, J. L.

AU - Bertocci, L. A.

AU - Nunnally, R. L.

AU - Parkey, R. W.

AU - Peshock, Ronald M

PY - 1989

Y1 - 1989

N2 - 31P MR spectroscopic studies of forearm exercise frequently assume that the volume sampled is appropriate for the muscle of interest and that individual variations in muscle anatomy and use are not important. Postexercise MR imaging was used to assess variations in the size, location, and use of forearm flexors and the accuracy of palpation as a method for locating the muscle of interest. By using the information obtained with MR, the effects of errors in surface-coil position relative to the muscle of interest on 31P MR spectroscopy were examined. In the midforearm of seven men, the greatest diameter of the flexor carpi ulnaris was 29 ± 4 mm, and that of the flexor digitorum superficialis was 28 ± 6 mm. However, in the proximal forearm, 58 ± 10% of the diameter was covered by the palmaris longus, when present (79% of subjects). An unexpected finding was that a focal portion of the superficial finger flexor was used primarily as a wrist flexor in 26% of subjects. Palpation incorrectly identified flexor muscle margins by more than 15 mm in 50% of attempts. When a surface coil was positioned over wrist flexors during handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-enhanced MR imaging reveals variations in forearm muscle anatomy and use that are common and difficult to appreciable by palpation. It therefore allows improved localization of the sensitive volume of MR spectroscopic studies of muscle physiology.

AB - 31P MR spectroscopic studies of forearm exercise frequently assume that the volume sampled is appropriate for the muscle of interest and that individual variations in muscle anatomy and use are not important. Postexercise MR imaging was used to assess variations in the size, location, and use of forearm flexors and the accuracy of palpation as a method for locating the muscle of interest. By using the information obtained with MR, the effects of errors in surface-coil position relative to the muscle of interest on 31P MR spectroscopy were examined. In the midforearm of seven men, the greatest diameter of the flexor carpi ulnaris was 29 ± 4 mm, and that of the flexor digitorum superficialis was 28 ± 6 mm. However, in the proximal forearm, 58 ± 10% of the diameter was covered by the palmaris longus, when present (79% of subjects). An unexpected finding was that a focal portion of the superficial finger flexor was used primarily as a wrist flexor in 26% of subjects. Palpation incorrectly identified flexor muscle margins by more than 15 mm in 50% of attempts. When a surface coil was positioned over wrist flexors during handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-handgrip, attenuation of exercise-induced changes in 31P spectra resulted. Exercise-enhanced MR imaging reveals variations in forearm muscle anatomy and use that are common and difficult to appreciable by palpation. It therefore allows improved localization of the sensitive volume of MR spectroscopic studies of muscle physiology.

UR - http://www.scopus.com/inward/record.url?scp=0024446024&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024446024&partnerID=8YFLogxK

M3 - Article

VL - 153

SP - 693

EP - 698

JO - American Journal of Roentgenology

JF - American Journal of Roentgenology

SN - 0361-803X

IS - 4

ER -