Results 41 to 50 of about 9,085 (238)

Association between medial gastrocnemius muscle-tendon unit architecture and ankle dorsiflexion range of motion with and without consideration of slack angle.

PLoS ONE, 2021
Joint flexibility is theoretically considered to associate with muscle-tendon unit (MTU) architecture. However, this potential association has not been experimentally demonstrated in humans in vivo.
Kosuke Hirata, Hiroaki Kanehisa, Naokazu Miyamoto   +2 more
doaj   +1 more source

Passive elongation of muscle fascicles in human muscles with short and long tendons

Physiological Reports, 2017
This study tested the hypothesis that the ratio of changes in muscle fascicle and tendon length that occurs with joint movement scales linearly with the ratio of the slack lengths of the muscle fascicles and tendons.
Jeanette M. Thom, Joanna Diong, Peter W. Stubbs, Robert D. Herbert   +3 more
doaj   +1 more source

Knee Moment-Angle Characteristics and Semitendinosus Muscle Morphology in Children with Spastic Paresis Selected for Medial Hamstring Lengthening. [PDF]

PLoS ONE, 2016
To increase knee range of motion and improve gait in children with spastic paresis (SP), the semitendinosus muscle (ST) amongst other hamstring muscles is frequently lengthened by surgery, but with variable success.
Helga Haberfehlner, Richard T Jaspers, Erich Rutz, Jules G Becher, Jaap Harlaar, Johannes A van der Sluijs, Melinda M Witbreuk, Jacqueline Romkes, Marie Freslier, Reinald Brunner, Huub Maas, Annemieke I Buizer   +11 more
doaj   +1 more source

The architectural characteristics of the hamstring muscles do not differ between male and female elite-level rugby union players

Frontiers in Physiology, 2023
Purpose: To determine whether differences exist in the architectural characteristics of the hamstring muscles of elite-level male and female rugby union players.Methods: Forty elite-level rugby union players (male n = 20, female n = 20) participated in ...
Kevin Cronin, Shane Foley, Seán Cournane, Giuseppe De Vito, Fearghal Kerin, Fearghal Kerin, Garreth Farrell, Eamonn Delahunt, Eamonn Delahunt   +8 more
doaj   +1 more source

Ultrasound-derived Biceps Femoris Long Head Fascicle Length: Extrapolation Pitfalls [PDF]

Medicine & Science in Sports & Exercise, 2019
ABSTRACT Purpose This study aimed to compare biceps femoris long head (BFlh) fascicle length (Lf) obtained with different ultrasound-based approaches: 1) single ultrasound images and linear Lf extrapolation, 2) single ultrasound images and one of two different trigonometric equations (termed equations A and B), and 3)
Franchi, Martino V, Fitze, Daniel P, Raiteri, Brent J, Hahn, Daniel, Spörri, Jörg   +4 more
openaire   +5 more sources

Muscle in Variable Gravity: “I Do Not Know Where I Am, But I Know What to Do”

Frontiers in Physiology, 2021
Purpose: Fascicle and sarcomere lengths are important predictors of muscle mechanical performance. However, their regulation during stretch-shortening cycle (SSC) activities in usual and challenging conditions is poorly understood.
Elena Monti, Janice Waldvogel, Ramona Ritzmann, Ramona Ritzmann, Kathrin Freyler, Kirsten Albracht, Kirsten Albracht, Michael Helm, Niccolò De Cesare, Piero Pavan, Carlo Reggiani, Albert Gollhofer, Marco Vincenzo Narici   +12 more
doaj   +1 more source

Combined DTI Tractography and Functional MRI Study of the Language Connectome in Healthy Volunteers: Extensive Mapping of White Matter Fascicles and Cortical Activations. [PDF]

PLoS ONE, 2016
Despite a better understanding of brain language organization into large-scale cortical networks, the underlying white matter (WM) connectivity is still not mastered.
François Vassal, Fabien Schneider, Claire Boutet, Betty Jean, Anna Sontheimer, Jean-Jacques Lemaire   +5 more
doaj   +1 more source

Change in length of relaxed muscle fascicles and tendons with knee and ankle movement in humans [PDF]

The Journal of Physiology, 2002
Ultrasonography was used to measure changes in length of muscle fascicles in relaxed human tibialis anterior and gastrocnemius during passively imposed changes in joint angle. Changes in the length of muscle fascicles were compared to changes in the length of the whole muscle‐tendon units calculated from joint angles and anthropometric data.
R D, Herbert, A M, Moseley, J E, Butler, S C, Gandevia   +3 more
openaire   +2 more sources

Relationship between joint torque and muscle fascicle shortening at various joint angles and intensities in the plantar flexors

Scientific Reports, 2017
Because it is difficult to measure tendon length changes directly in humans, tendon length changes during dynamic movement have been evaluated indirectly from changes in muscle fascicle length and joint angle. The purpose of this study was to examine the
Atsuki Fukutani, Jun Misaki, Tadao Isaka
doaj   +1 more source

Pre-activation affects the effect of stretch-shortening cycle by modulating fascicle behavior

Biology Open, 2019
The torque attained during active shortening is enhanced after an active stretch (stretch-shortening cycle, SSC). This study examined the influence of pre-activation on fascicle behavior and the SSC effect.
Atsuki Fukutani, Kento Shimoho, Tadao Isaka   +2 more
doaj   +1 more source