Results 181 to 190 of about 6,708 (217)

Effects of Pennate Angle on FAM Bundle Hydraulic Efficiency for Robot Arm Motion

ASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, 2022
Abstract This paper will investigate the effects of pennate angle on fluidic artificial muscle (FAM) bundles for a robot arm motion. Rising interest in soft fluidic actuators exists due to their prospective inherent compliance and safe human-robot interaction.
Emily Duan, Matthew Bryant
openaire   +1 more source

A New Approach to Estimation of Muscle Pennation Angle in Ultrasound Image

2010 4th International Conference on Bioinformatics and Biomedical Engineering, 2010
Ultrasound imaging has been an effective tool for measuring the muscle architectures, including the pennation angle. In this work, we proposed a new approach combining wavelet transform (WT) and Hough transform (HT) to detect the straight line-shaped patterns of aponeurosis, fascicle or bone, and then to quantify the pennation angles in ultrasound ...
Li-jin Huang, Jun Shi
openaire   +1 more source

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

Change in the pennation angle of the supraspinatus muscle after rotator cuff tear repair

Journal of Shoulder and Elbow Surgery, 2019
The pennation angle is an important architectural and functional feature of pennate muscles. The purpose of this study was to investigate the change in the pennation angle of the supraspinatus muscle after rotator cuff tear repair.The study included 68 patients who underwent arthroscopic rotator cuff repair and magnetic resonance imaging.
Ikuta, Hayashi, Makoto, Enokida, Keita, Nagira, Takahiro, Yamasita, Yasuto, Tsukutani, Taiki, Murakami, Hideki, Nagashima   +6 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

Effects of pennation angle, electrodes orientation and knee angle on surface electromyography of vastus lateralis during isometric contractions

Sport Sciences for Health, 2017
The effects of pennation angle (PA), electrode orientation (EO) and knee angle (KA) on the amplitude of electromyography signal (EMG) of vastus lateralis muscle (VL) were investigated. Seventeen participants (8 men and 9 women; 26.5 ± 5.1 years; 64.4 ± 12.3 kg; 1.66 ± 0.09 m) accomplished isometric tests at four contraction intensities (COI): 25, 50 ...
Felipe Torres Miranda Oliveira, Carlos Gomes de Oliveira, Walace David Monteiro, Paulo Farinatti   +3 more
openaire   +1 more source

A computational approach to calculate personalized pennation angle based on MRI: effect on motion analysis

International Journal of Computer Assisted Radiology and Surgery, 2015
Muscles are the primary component responsible for the locomotion and change of posture of the human body. The physiologic basis of muscle force production and movement is determined by the muscle architecture (maximum muscle force, [Formula: see text], optimal muscle fiber length, [Formula: see text], tendon slack length, [Formula: see text], and ...
Chincisan, Andra-Ioana-Maria, Tecante, Karelia, Becker, Matthias, Magnenat Thalmann, Nadia, Hurschler, Christof, Choi, Hon Fai   +5 more
openaire   +3 more sources

Reproducibility of fascicle length and pennation angle of gastrocnemius medialis in human gait in vivo

Gait & Posture, 2010
The purpose of the current study was to examine the reproducibility of fascicle length and pennation angle of gastrocnemius medialis while human walking. To the best of our knowledge, this is the first study of the reproducibility of fascicle length and pennation angle of gastrocnemius medialis in vivo during human gait.
Aggeloussis, Nickos, Giannakou, Erasmia, Albracht, Kirsten (Prof. Dr.), Arampatzis, Adamantios   +3 more
openaire   +3 more sources

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

Muscle Force per Cross-sectional Area is Inversely Related with Pennation Angle in Strength Trained Athletes

Journal of Strength and Conditioning Research, 2008
The present study aimed to examine the effect of pennation angle on the force per cross-sectional area for elbow extensor muscles in strength-trained athletes. A total of 52 male bodybuilders (n = 32) and Olympic weightlifters (n = 20) did maximal isometric elbow extension on an isokinetic dynamometer. Muscle cross-sectional area (CSA) and muscle-fiber
Shigeki, Ikegawa, Kazuo, Funato, Naoya, Tsunoda, Hiroaki, Kanehisa, Tetsuo, Fukunaga, Yasuo, Kawakami   +5 more
openaire   +2 more sources