In vivo determination of the compliance of the passive series elastic component of the human quadriceps femoris muscle

1991 ◽  
Vol 24 (6) ◽  
pp. 453
Author(s):  
M. Voigt
Keyword(s):  
Quadriceps Femoris ◽  
Elastic Component ◽  
Quadriceps Femoris Muscle ◽  
Series Elastic Component ◽  
Femoris Muscle ◽  
Series Elastic

In vivo specific tension of the human quadriceps femoris muscle

2009 ◽  
Vol 106 (6) ◽  
pp. 827-838 ◽  
Author(s):  
Robert M. Erskine ◽  
David A. Jones ◽  
Constantinos N. Maganaris ◽  
Hans Degens
Keyword(s):  
Quadriceps Femoris ◽  
Quadriceps Femoris Muscle ◽  
Specific Tension ◽  
Femoris Muscle

A New Method for the Determination of the Characteristic Shape of an Isokinetic Quadriceps Femoris Muscle Torque Curve

1992 ◽  
Vol 72 (8) ◽  
pp. 585-592 ◽  
Author(s):  
Leslie Afzali ◽  
Fumi Kuwabara ◽  
James Zachazewski ◽  
Phyllis Browne ◽  
Bonnie Robinson
Keyword(s):  
Quadriceps Femoris ◽  
New Method ◽  
Quadriceps Femoris Muscle ◽  
Characteristic Shape ◽  
Muscle Torque ◽  
Torque Curve ◽  
Femoris Muscle

Behavior of human muscle fascicles during shortening and lengthening contractions in vivo

2003 ◽  
Vol 95 (3) ◽  
pp. 1090-1096 ◽  
Author(s):  
Neil D. Reeves ◽  
Marco V. Narici
Keyword(s):  
Ankle Joint ◽  
Pennation Angle ◽  
Human Muscle ◽  
Elastic Component ◽  
Fascicle Length ◽  
Series Elastic Component ◽  
Muscle Fascicles ◽  
Muscle Actions ◽  
Series Elastic

The aim of the present study was to investigate the behavior of human muscle fascicles during dynamic contractions. Eight subjects performed maximal isometric dorsiflexion contractions at six ankle joint angles and maximal isokinetic concentric and eccentric contractions at five angular velocities. Tibialis anterior muscle architecture was measured in vivo by use of B-mode ultrasonography. During maximal isometric contraction, fascicle length was shorter and pennation angle larger compared with values at rest ( P < 0.01). During isokinetic concentric contractions from 0 to 4.36 rad/s, fascicle length measured at a constant ankle joint angle increased curvilinearly from 49.5 to 69.7 mm (41%; P < 0.01), whereas pennation angle decreased curvilinearly from 14.8 to 9.8° (34%; P < 0.01). During eccentric muscle actions, fascicles contracted quasi-isometrically, independent of angular velocity. The behavior of muscle fascicles during shortening contractions was believed to reflect the degree of stretch applied to the series elastic component, which decreases with increasing contraction velocity. The quasi-isometric behavior of fascicles during eccentric muscle actions suggests that the series elastic component acts as a mechanical buffer during active lengthening.

Sign in / Sign up

Export Citation Format

Share Document