scholarly journals A novel diffusion-tensor MRI approach for skeletal muscle fascicle length measurements

2016 ◽  
Vol 4 (24) ◽  
pp. e13012 ◽  
Author(s):  
Jos Oudeman ◽  
Valentina Mazzoli ◽  
Marco A. Marra ◽  
Klaas Nicolay ◽  
Mario Maas ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Diffusion Tensor ◽  
Diffusion Tensor Mri ◽  
Fascicle Length ◽  
Muscle Fascicle ◽  
Length Measurements

scholarly journals Poor agreement between ultrasound and inbuilt diffusion tensor MRI measures of biceps femoris long head fascicle length

2018 ◽  
Vol 2 (2) ◽  
pp. 58-63 ◽  
Author(s):  
Fearghal P. Behan ◽  
Robin Vermeulen ◽  
Tessa Smith ◽  
Javier Arnaiz ◽  
Rodney Whiteley ◽  
...  
Keyword(s):  
Diffusion Tensor ◽  
Biceps Femoris ◽  
Diffusion Tensor Mri ◽  
Poor Agreement ◽  
Fascicle Length ◽  
Long Head ◽  
Biceps Femoris Long Head

scholarly journals P-43 Titin genotype is associated with skeletal muscle fascicle length in recreationally active men and running performance in habitually trained marathon runners

2016 ◽  
Vol 50 (Suppl 1) ◽  
pp. A55-A56
Author(s):  
Georgina K Stebbings ◽  
Alun G Williams ◽  
Adam J Herbert ◽  
Sarah J Lockey ◽  
Shane M Heffernan ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Fascicle Length ◽  
Marathon Runners ◽  
Running Performance ◽  
Muscle Fascicle

scholarly journals Skeletal muscle diffusion tensor-MRI fiber tracking: rationale, data acquisition and analysis methods, applications and future directions

2016 ◽  
Vol 30 (3) ◽  
pp. e3563 ◽  
Author(s):  
Bruce M. Damon ◽  
Martijn Froeling ◽  
Amanda K. W. Buck ◽  
Jos Oudeman ◽  
Zhaohua Ding ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Data Acquisition ◽  
Diffusion Tensor ◽  
Fiber Tracking ◽  
Diffusion Tensor Mri ◽  
Future Directions ◽  
Analysis Methods

scholarly journals Three-dimensional architecture of the whole human soleus muscle in vivo

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4610 ◽  
Author(s):  
Bart Bolsterlee ◽  
Taija Finni ◽  
Arkiev D’Souza ◽  
Junya Eguchi ◽  
Elizabeth C. Clarke ◽  
...  
Keyword(s):  
Soleus Muscle ◽  
Diffusion Tensor ◽  
Three Dimensional ◽  
Muscle Length ◽  
Fascicle Length ◽  
Cross Sectional ◽  
Quantitative Measurements ◽  
Muscle Fascicle ◽  
Total Muscle

Background Most data on the architecture of the human soleus muscle have been obtained from cadaveric dissection or two-dimensional ultrasound imaging. We present the first comprehensive, quantitative study on the three-dimensional anatomy of the human soleus muscle in vivo using diffusion tensor imaging (DTI) techniques. Methods We report three-dimensional fascicle lengths, pennation angles, fascicle curvatures, physiological cross-sectional areas and volumes in four compartments of the soleus at ankle joint angles of 69 ± 12° (plantarflexion, short muscle length; average ± SD across subjects) and 108 ± 7° (dorsiflexion, long muscle length) of six healthy young adults. Microdissection and three-dimensional digitisation on two cadaveric muscles corroborated the compartmentalised structure of the soleus, and confirmed the validity of DTI-based muscle fascicle reconstructions. Results The posterior compartments of the soleus comprised 80 ± 5% of the total muscle volume (356 ± 58 cm3). At the short muscle length, the average fascicle length, pennation angle and curvature was 37 ± 8 mm, 31 ± 3° and 17 ± 4 /m, respectively. We did not find differences in fascicle lengths between compartments. However, pennation angles were on average 12° larger (p < 0.01) in the posterior compartments than in the anterior compartments. For every centimetre that the muscle-tendon unit lengthened, fascicle lengths increased by 3.7 ± 0.8 mm, pennation angles decreased by −3.2 ± 0.9° and curvatures decreased by −2.7 ± 0.8 /m. Fascicles in the posterior compartments rotated almost twice as much as in the anterior compartments during passive lengthening. Discussion The homogeneity in fascicle lengths and inhomogeneity in pennation angles of the soleus may indicate a functionally different role for the anterior and posterior compartments. The data and techniques presented here demonstrate how DTI can be used to obtain detailed, quantitative measurements of the anatomy of complex skeletal muscles in living humans.

scholarly journals Effect of resistance training on skeletal muscle-specific force in elderly humans

2004 ◽  
Vol 96 (3) ◽  
pp. 885-892 ◽  
Author(s):  
N. D. Reeves ◽  
M. V. Narici ◽  
C. N. Maganaris
Keyword(s):  
Skeletal Muscle ◽  
Strength Training ◽  
Old Age ◽  
Vastus Lateralis ◽  
Muscle Volume ◽  
Electromyographic Activity ◽  
Specific Force ◽  
Fascicle Length ◽  
Leg Extension ◽  
Muscle Fascicle

This study assessed muscle-specific force in vivo following strength training in old age. Subjects were assigned to training ( n = 9, age 74.3 ± 3.5 yr; mean ± SD) and control ( n = 9, age 67.1 ± 2 yr) groups. Leg-extension and leg-press exercises (2 sets of 10 repetitions at 80% of the 5 repetition maximum) were performed three times/wk for 14 wk. Vastus lateralis (VL) muscle fascicle force was calculated from maximal isometric voluntary knee extensor torque with superimposed stimuli, accounting for the patella tendon moment arm length, ultrasound-based measurements of muscle architecture, and antagonist cocontraction estimated from electromyographic activity. Physiological cross-sectional area (PCSA) was calculated from the ratio of muscle volume to fascicle length. Specific force was calculated by dividing fascicle force by PCSA. Fascicle force increased by 11%, from 847.9 ± 365.3 N before to 939.3 ± 347.8 N after training ( P < 0.05). Due to a relatively greater increase in fascicle length (11%) than muscle volume (6%), PCSA remained unchanged (pretraining: 30.4 ± 8.9 cm2; posttraining: 29.1 ± 8.4 cm2; P > 0.05). Activation capacity and VL muscle root mean square electromyographic activity increased by 5 and 40%, respectively, after training ( P < 0.05), indicating increased agonist neural drive, whereas antagonist cocontraction remained unchanged ( P > 0.05). The VL muscle-specific force increased by 19%, from 27 ± 6.3 N/cm2 before to 32.1 ± 7.4 N/cm2 after training ( P < 0.01), highlighting the effectiveness of strength training for increasing the intrinsic force-producing capacity of skeletal muscle in old age.

Measurement of Skeletal Muscle Fascicle Length

2021 ◽  
pp. 79-91
Author(s):  
Yongjin Zhou ◽  
Yong-Ping Zheng
Keyword(s):  
Skeletal Muscle ◽  
Fascicle Length ◽  
Muscle Fascicle

scholarly journals Diffusion-tensor MRI-based skeletal muscle fiber tracking

2011 ◽  
Vol 3 (6) ◽  
pp. 675-687 ◽  
Author(s):  
Bruce M Damon ◽  
Amanda KW Buck ◽  
Zhaohua Ding
Keyword(s):  
Skeletal Muscle ◽  
Muscle Fiber ◽  
Diffusion Tensor ◽  
Fiber Tracking ◽  
Skeletal Muscle Fiber ◽  
Diffusion Tensor Mri
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