Results 131 to 140 of about 874,825 (155)

Influence of pennation angle on measurement of shear wave elastography: in vivo observation of shear wave propagation in human pennate muscle

Physiological Measurement, 2018
Abstract Objective : To examine the influence of pennation angle on measurement of shear wave elastography, this study utilised the propagation view mode that can reveal shear wave propagation in human pennate muscle in vivo . Approach
Kentaro, Chino, Hideyuki, Takahashi
openaire   +2 more sources

A comparison of muscle pennation angles measured with DTI fiber tractography and 3D-ultrasound

ISMRM Annual Meeting, 2023
Pennation angle is an important architecture parameter to understand muscle functioning. It is commonly measured using 2D ultrasound. However, it is difficult to infer 3D muscle architecture from 2D imaging. Therefore, we compare the pennation angle measurements obtained with 3D-DTI fiber-tractography and 3D-ultrasound (3D-US).
Laura Secondulfo, Moritz Eggelbusch, Rob Wust, Guido Weide, Richard Jaspers, Aart Nederveen, Melissa Hooijmans, Gustav Strijkers   +7 more
openaire   +1 more source

In vivo Measurement of Fascicle Length and Pennation Angle of the Human Biceps femoris Muscle

Cells Tissues Organs, 2001
The purpose of this investigation was to measure in vivo fascicle length (L_fas) and pennation angle (PA) of the long head of the biceps femoris muscle (BF_lh m.) at different hip and knee angles while the muscle was relaxed using ultrasonography (US).
G S, Chleboun, A R, France, M T, Crill, H K, Braddock, J N, Howell   +4 more
openaire   +2 more sources

Estimation of muscle pennation angle in ultrasound images using the beamlet transform

Journal of Shanghai University (English Edition), 2010
Ultrasound imaging has been widely used to investigate the architecture properties of skeletal muscle, including the measurement of the pennation angle. In this study, we propose a beamlet-based algorithm to detect the straight line-shaped patterns of aponeurosis, fascicle or bone, and then to quantify the pennation angle in ultrasound images.
Jun Shi, Rui-ling Wang
openaire   +1 more source

Pennation Angle Does Not Influence the Age-Related Differences in Echo Intensity of the Medial Gastrocnemius

Ultrasound in Medicine & Biology, 2015
The reflection of an ultrasound (US) wave is strongest when the propagation direction of the wave is perpendicular to muscle fascicles. Thus, it is possible that muscle echo intensity (EI), a gray-scale US measure of muscle quality, may be influenced by the angulation of muscle fascicles.
Eric D, Ryan, Joseph G, Rosenberg, Michael J, Scharville, Eric J, Sobolewski, Andrew J, Tweedell, Craig R, Kleinberg   +5 more
openaire   +2 more sources

Pennation angles of ankle dorsiflexor and plantarflexors depending on muscle contraction intensity

International Journal of Precision Engineering and Manufacturing, 2013
In this study, we investigated the pennation angles of ankle muscles as they relate to muscle contraction intensity (MCI). Eight male subjects with no history of musculoskeletal injuries participated. In each patient, the ankle joint was fixed at 15° dorsiflexion and 0°, 15° and 30° plantarflexion.
Seunghyeon Kim, Jongsang Son, Changho Yi, Doosup Kim, Youngho Kim   +4 more
openaire   +1 more source

An anatomical description of the pennation angles and central tendon angle of the supraspinatus both in its normal configuration and with full thickness tears

Journal of Shoulder and Elbow Surgery, 2011
It is hypothesized that supraspinatus central tendon retraction is related to functional deficit; yet, there is no literature comparing the normal and pathological pennation and central tendon angles using magnetic resonance imaging (MRI). Therefore, the aim of this study was to quantify the anterior and posterior muscle pennation angles, central ...
Simon M, Thompson, Peter, Reilly, Roger J, Emery, Anthony M J, Bull   +3 more
openaire   +2 more sources

Fatigue-Induced Continuous Changes in Muscle Pennation Angle during Isometric Contraction

2010 4th International Conference on Bioinformatics and Biomedical Engineering, 2010
Muscle fatigue is an exercise-induced reduction in the maximal capacity of muscle to produce force or power output. The continuous changes of brachialis pennation angles during the fatiguing isometric contraction was investigated in this study. The muscle torque, surface electromyography (SEMG) and ultrasound image of brachialis were continuously ...
Jun Shi, Jing-yi Guo, Yong-jin Zhou, Yong-ping Zheng   +3 more
openaire   +1 more source

THE RELATIONSHIP OF PENNATION ANGLE TO THE INDEX OF ARCHITECTURE IN MUSCLE461

Medicine &amp Science in Sports &amp Exercise, 1996
L. Li, G. E. Caldwell
openaire   +1 more source

Ultrasound assessment of rectus femoris pennation angle and echogenicity. Their association with muscle functional measures and fat infiltration measured by CT scan

Clinical Nutrition ESPEN, 2023
Daniel Bunout, Sandra Hirsch, Gladys Barrera   +2 more
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