FDG-PET imaging of lower extremity muscular activity during level walking

Naoyuki, OI; Iwaya, Tsutomu; Itoh, Masatoshi; Yamaguchi, Keiichiro; Tobimatsu, Yoshiko; Fujimoto, Toshiaki

doi:10.1007/s007760300009

Cited by 42 publications

(58 citation statements)

References 13 publications

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“…Another study (Hannukainen et al 2005) reported the values of ~4.5 μmol/100g/min using the same protocol as Kemppainen et al, at (76.9 ± 15.6 W). Yet another study, comparing GU response to exercise in trained and untrained men, reported quadriceps femoris GU of ~5 μmol/100g/min in untrained men during cycle ergometry at 30% VO 2max (Fujimoto et al 2003). We calculated Sol-to-FHL, MG-to-FHL, and LG-to-FHL ratios of EMG and GU to further quantify the relative role of deep and superficial plantarflexor muscles.…”

Section: Discussionmentioning

confidence: 99%

“…Although the exercise protocol could theoretically be performed during the PET scan, we chose to do the exercise before the PET scan. Such a protocol has been recently applied in several other experiments (Kemppainen et al 2002, Fujimoto et al 2003, Hannukainen et al 2005) made possible by the properties of [ 18 F]-FDG that enables entrapment into the cells. As there is some tracer still available in the plasma to be taken up by the cells after the cessation of exercise, it may affect the measure of glucose uptake during exercise.…”

Section: Discussionmentioning

confidence: 99%

“…The obtained PET images were corrected for decay and parametric fractional uptake rate (FUR) images were computed using the PET image data and the individual input function (plasma radioactivity data) as described previously (Kemppainen et al 2002, Fujimoto et al 2003. The regions of interest (ROIs) were drawn to include the whole individual muscle on the transverse plane FUR images using Carimas 2.0 software (Turku PET Centre, University of Turku, Turku, Finland).…”

Section: Image Assessmentmentioning

confidence: 99%

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Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Masood

Bojsen‐Møller

Kalliokoski

et al. 2014

Journal of Electromyography and Kinesiology

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Finni, T. (2014). Differential contributions of ankle plantarflexors during submaximal isometric muscle action: a PET and EMG study. Journal of Electromyography & Kinesiology, 24,[367][368][369][370][371][372][373][374] Dette er siste tekst-versjon av artikkelen, og den kan inneholde små forskjeller fra forlagets pdf-versjon. Forlagets pdf-versjon finner du på www.sciencedirect.com: http://dx.doi.org/10. 1016/j.jelekin.2014.03.002 This is the final text version of the article, and it may contain minor differences from the journal's pdf version. Cumulative EMG from all parts of the triceps surae (TS) muscle accounted for ~70 % of the total EMG signal. As for glucose uptake, the highest quantity was found in MG (2.4 ± 0.8 μmol/100g/min), whereas FHL (1.8 ± 0.6 μmol/100g/min) had the lowest uptake. Cumulative GU of triceps surae muscle constituted nearly 80 % of combined GU of all four plantarflexors.The findings of the current study provide valuable reference for studies where individual muscle contributions are estimated using models and simulations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Image Assessmentmentioning

confidence: 99%

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Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Masood

Bojsen‐Møller

Kalliokoski

et al. 2014

Journal of Electromyography and Kinesiology

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“…Exercise-induced 18 F-FDG uptake in skeletal muscles has been studied (9,10,15). With treadmill exercise, 18 F-FDG uptake increases in the soleus, gastrocnemius, gluteal, and quadriceps muscles, followed by adductors and hamstring muscles.…”

Section: Discussionmentioning

confidence: 99%

“…Increased mitochondrial biogenesis and increases of GLUT4 and hexokinase are detectable within hours to days of initiating an exercise program (8). The resulting increased glucose uptake in muscles can be visualized with 18 F-FDG (9,10). Guidelines recommend that patients refrain from physical exercise for at least several hours before 18 F-FDG PET (11,12) to improve tumor versus muscle 18 F-FDG uptake and overall PET image quality.…”

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confidence: 99%

Treadmill Exercise Inducing Mild to Moderate Ischemia Has No Significant Effect on Skeletal Muscle or Cardiac ¹⁸F-FDG Uptake and Image Quality on Subsequent Whole-Body PET Scan

Lyall

Capobianco²,

Strausś³

et al. 2012

J Nucl Med

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We report the effects of treadmill exercise on 18 F-FDG uptake in skeletal muscles and image quality of torso PET and compare stress myocardial perfusion imaging patterns with myocardial 18 F-FDG uptake. There were 3 groups of patients: 48 patients underwent PET within 8 h after a treadmill test (Ex 8), 45 patients within 48 h after a treadmill test (Ex 48), and 34 patients without prior exercise. Mean workload (8.4 6 2.3 [Ex 8] vs. 8.9 6 2.6 metabolic equivalents [Ex 48]) was similar in both exercise groups. Muscle uptake was assessed by standardized uptake value. Myocardial uptake patterns were compared visually. Minor differences between patient groups were noted only for maximum standardized uptake value in quadriceps muscles. There was no correlation between perfusion defects and myocardial 18 F-FDG uptake patterns. Thus, treadmill exercise does not affect muscle 18 F-FDG uptake or image quality on subsequent PET. Cardiac 18 F-FDG uptake on torso PET scans is unrelated to myocardial perfusion status.

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Verification of a standardized method for inserting intramuscular EMG electrodes into uniquely oriented segments of gluteus minimus and gluteus medius

et al. 2012

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ABSTRACT.Guidelines for assessing the function of gluteus minimus and gluteus medius with electromyography (EMG) traditionally offer one electrode placement site per muscle.However, anatomical studies suggest that there are two uniquely oriented segments within gluteus minimus (anterior and posterior), and three within gluteus medius (anterior, middle and posterior) with potential for independent function. Assessment of these muscles with one electrode may therefore provide only a limited account of their role. Thus, the aim of this cadaveric study was to verify guidelines for placing intramuscular electrodes into two uniquely oriented segments of gluteus minimus, and three segments of gluteus medius. The guidelines were developed with reference to anatomical reports, cadaveric observation and real-time ultrasound imaging in-vivo. Five cadaveric gluteal regions were marked for intramuscular electrode insertions based on these guidelines. Intramuscular electrodes were inserted into the marked regions of gluteus minimus (x2) and gluteus medius (x3) with the aid of a 15 cm biopsy needle. Systematic dissection revealed that electrodes were successfully inserted into uniquely oriented segments of gluteus minimus and medius. The orientation of fascicles surrounding each electrode was also consistent with segmental descriptions in past anatomical research. The findings of this research suggest that the guidelines described may be used to assess the functional role of segments within gluteus minimus and medius in health and dysfunction using EMG. Finally, electromyographers intent on investigating the role of posterior gluteus minimus must be cautious of the superior gluteal neurovascular bundle.

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FDG-PET imaging of lower extremity muscular activity during level walking

Cited by 42 publications

References 13 publications

Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Treadmill Exercise Inducing Mild to Moderate Ischemia Has No Significant Effect on Skeletal Muscle or Cardiac ¹⁸F-FDG Uptake and Image Quality on Subsequent Whole-Body PET Scan

Verification of a standardized method for inserting intramuscular EMG electrodes into uniquely oriented segments of gluteus minimus and gluteus medius

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FDG-PET imaging of lower extremity muscular activity during level walking

Cited by 42 publications

References 13 publications

Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Differential contributions of ankle plantarflexors during submaximal isometric muscle action: A PET and EMG study

Treadmill Exercise Inducing Mild to Moderate Ischemia Has No Significant Effect on Skeletal Muscle or Cardiac 18F-FDG Uptake and Image Quality on Subsequent Whole-Body PET Scan

Verification of a standardized method for inserting intramuscular EMG electrodes into uniquely oriented segments of gluteus minimus and gluteus medius

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Treadmill Exercise Inducing Mild to Moderate Ischemia Has No Significant Effect on Skeletal Muscle or Cardiac ¹⁸F-FDG Uptake and Image Quality on Subsequent Whole-Body PET Scan