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

2001 ◽  
Vol 169 (4) ◽  
pp. 401-409 ◽  
Author(s):  
Gary S. Chleboun ◽  
Antoinette R. France ◽  
Matthew T. Crill ◽  
Holly K. Braddock ◽  
John N. Howell
Keyword(s):  
Biceps Femoris ◽  
Pennation Angle ◽  
Fascicle Length ◽  
Biceps Femoris Muscle ◽  
In Vivo Measurement ◽  
Femoris Muscle

scholarly journals The Effects of Eccentric Training on Biceps Femoris Architecture and Strength: A Systematic Review With Meta-Analysis

2020 ◽  
Vol 55 (5) ◽  
pp. 501-514 ◽  
Author(s):  
Rémy Gérard ◽  
Léo Gojon ◽  
Philippe Decleve ◽  
Joachim Van Cant
Keyword(s):  
Strength Training ◽  
Meta Analysis ◽  
Muscle Thickness ◽  
Biceps Femoris ◽  
Pennation Angle ◽  
Fascicle Length ◽  
Biceps Femoris Muscle ◽  
Randomized Controlled ◽  
Long Head ◽  
Femoris Muscle

Objective To determine the effects of an eccentric hamstrings strength-training program, performed for at least 4 weeks by healthy adults, on muscle architecture and eccentric strength. Data Sources A systematic search was performed up to October 2018 in the following electronic databases: PubMed, PEDro, CINAHL and SPORTDiscus. Combinations of the following search terms were used: eccentric strength training, eccentric loading, nordic hamstring, hamstring strength, fascicle length, pennation angle, muscle thickness, muscle architecture, biceps femoris long head, biceps femoris, and hamstring muscles. Study Selection Included articles were randomized controlled trials that allowed comparisons between isolated eccentric strength training of the biceps femoris muscle and other programs. Data Extraction Data from the included studies were extracted by 2 independent reviewers. These data included the study design, participant characteristics, inclusion and exclusion criteria of clinical studies, exercise and intervention characteristics, outcome measures, and the main results of the study. When meta-analysis was possible, we performed quantitative analysis. Ten randomized controlled trials were included. Data Synthesis Limited to moderate evidence indicated that eccentric strength training was associated with an increase in fascicle length (mean difference [MD] = 1.97; 95% confidence interval [CI] = 1.48, 2.46), an increase in muscle thickness (MD = 0.10; 95% CI = 0.06, 0.13), and a decrease in pennation angle (MD = 2.36; 95% CI = 1.61, 3.11). Conflicted to moderate evidence indicated that eccentric hamstrings strength was increased after eccentric strength training compared with concentric strength training (standardized mean difference [SMD] = 1.06; 95% CI = 0.26, 1.86), usual level of activity (SMD = 2.72; 95% CI = 1.68, 3.77), and static stretching (SMD = 0.39; 95% CI = −0.97, 1.75). Conclusions In healthy adults, an eccentric strength-training program produced architectural adaptations on the long head of the biceps femoris muscle and increased eccentric hamstrings strength.

scholarly journals NEUROMUSCULAR CHARACTERISTIC OF BICEPS FEMORIS MUSCLE IN THE TOP SERBIAN SOCCER PLAYERS MEASURED BY TENSIOMYOGRAPHY METHOD: QUANTITATIVE MODEL

2019 ◽  
pp. 167
Author(s):  
Miloslav Fabok ◽  
Bojan Leontijević ◽  
Lazar Tomić ◽  
Milivoj Dopsaj
Keyword(s):  
Body Height ◽  
Biceps Femoris ◽  
Football Player ◽  
Quantitative Model ◽  
The Body ◽  
Locomotor System ◽  
Biceps Femoris Muscle ◽  
Significant Difference ◽  
Transition Training ◽  
Femoris Muscle

The main aim of this study was to define the quantitative neuromuscular characteristics of Biceps Femoris muscle (BF) as the knee joint flexor, i.e. the major synergist of caudal body in all specific movement tasks of a football player, measured by tensiomyography (TMG) method . The secondary aim of the study was to compare all TMG-BF characteristics in relation to bilateral dimorphism, as well as to compare dominant and non-dominant legs. The research was conducted on a sample which included 54 professional players of age 23.0 ± 4.4 years; body height: 182.6 ± 15.1 cm; body mass: 81.2 ± 15.1 kg; BMI: 23.3 ± 1.2 kg/cm2. TMG variables were measured on the muscles during a transition training phase (mid-season and end of the season). The results have shown that the average Tc - 32.19 ± 7.64 and 33.21 ± 8.88 ms, Td - 25.56 ± 3.58 and 25.44 ± 3.20 ms, and Dm - 7.39 ± 1.87 and 7.52 ± 2.50 mm, for dominant and non-dominant leg, respectively. The results have indicated that there was no statistically significant difference between the examined TMG variables of dominant and non-dominant leg (Wilks' lambda Value = 0.979, F=0.300, p=0.952, Part. Ƞ2 = 0.021). It may be stated that there are no differences in the manifestation of neuromuscular characteristics in healthy elite football players regardless of their dominant leg. A high level of preparedness in football in addition to a completely healthy status of the body and locomotor system result in a complete neuromuscular contractile symmetry BF of both legs.

scholarly journals Comparison of physical and qualitative traits of meat of two Polish conservative flocks of ducks

2004 ◽  
Vol 47 (4) ◽  
pp. 367-375 ◽  
Author(s):  
T. Kisiel ◽  
J. M. Książkiewicz
Keyword(s):  
Subcutaneous Fat ◽  
Biceps Femoris ◽  
Point Of View ◽  
Muscle Fibres ◽  
Mean Values ◽  
Qualitative Traits ◽  
Biceps Femoris Muscle ◽  
Leg Muscles ◽  
L Value ◽  
Femoris Muscle

Abstract. In two Polish conservative flocks of Miniduck (K2) and Pekin (P33), registered by FAO as domestic genetic resources (World Watch List, 2000) the mean values of physical (tissue components) and qualitative traits of meat (pH15, pH24, colour of meat) were determined. The experimental flocks showed significant variations in body weight at 7 weeks of age (1540 vs 2088 in drakes and 1395 vs 1986 g in ducks), in the proportion of breast and leg muscles and skin with subcutaneous fat in eviscerated carcass. K2 ducks are characterized by outstanding musculature of breast and P33 ducks by that of lower leg and by low fatness. pH15 values of breast and leg muscles in K2 and P33 birds were greater than pH24 of these muscles. In both flocks pH15 values of 6.09 to 6.33 and pH24 values of 5.90 to 6.05 in breast muscles were lower than in leg muscles (6.33 to 6.46 and 6.12 to 6.37, respectively). A significantly lower L* value (darker colour) of breast muscle was characteristic of K2 birds (43.7 in males and 40.5 in females) compared to P33 males and females. Furthermore, breast muscles of K2 drakes and ducks had significantly higher redness (a*) and yellowness values (b*) than P33. In pectoralis superficialis muscle of K2 and P33 females, a significantly lower diameter was found for white muscle fibres (αW) (30.0 to 30.5 μm) and for red muscle fibres (βR) (16.9 to 17.6 μm) than in biceps femoris muscle (αW from 48.3 to 54.2; βR from 36.0 to 37.1 μm). Muscle fibres of K2 compared to P33 ducks were characterized by significantly greater diameters of βR muscle fibre in pectoralis superficialis muscle, and by lower αW and βR fibre diameters in biceps femoris muscle. The experiment showed that meat of ducks from the conservative flocks studied is valuable from the consumer’s point of view.

P107 In vivo reproducibility of fascicle length and pennation angle of gastrocnemius medialis muscle during human gait

2008 ◽  
Vol 28 ◽  
pp. S114-S115
Author(s):  
N. Aggeloussis ◽  
E. Giannakou ◽  
K. Albracht ◽  
A. Arampatzis
Keyword(s):  
Pennation Angle ◽  
Human Gait ◽  
Fascicle Length ◽  
Gastrocnemius Medialis

scholarly journals Timing of Rectus Femoris and Biceps Femoris Muscle Activities in Both Legs at Maximal Running Speed

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Gaku Kakehata ◽  
Yuta Goto ◽  
Shigeo Iso ◽  
Kazuyuki Kanosue
Keyword(s):  
Rectus Femoris ◽  
Biceps Femoris ◽  
Running Speed ◽  
Biceps Femoris Muscle ◽  
Femoris Muscle

Nonisometric behavior of fascicles during isometric contractions of a human muscle

1998 ◽  
Vol 85 (4) ◽  
pp. 1230-1235 ◽  
Author(s):  
Masamitsu Ito ◽  
Yasuo Kawakami ◽  
Yoshiho Ichinose ◽  
Senshi Fukashiro ◽  
Tetsuo Fukunaga
Keyword(s):  
Young’S Modulus ◽  
Joint Angle ◽  
Young's Modulus ◽  
Pennation Angle ◽  
Human Muscle ◽  
Isometric Contractions ◽  
Fascicle Length ◽  
Tendon Stiffness ◽  
Tendon Elongation

Fascicle length, pennation angle, and tendon elongation of the human tibialis anterior were measured in vivo by ultrasonography. Subjects ( n = 9) were requested to develop isometric dorsiflexion torque gradually up to maximal at the ankle joint angle of 20° plantarflexion from the anatomic position. Fascicle length shortened from 90 ± 7 to 76 ± 7 (SE) mm, pennation angle increased from 10 ± 1 to 12 ± 1°, and tendon elongation increased up to 15 ± 2 mm with graded force development up to maximum. The tendon stiffness increased with increasing tendon force from 10 N/mm at 0–20 N to 32 N/mm at 240–260 N. Young’s modulus increased from 157 MPa at 0–20 N to 530 MPa at 240–260 N. It can be concluded that, in isometric contractions of a human muscle, mechanical work, some of which is absorbed by the tendinous tissue, is generated by the shortening of muscle fibers and that ultrasonography can be used to determine the stiffness and Young’s modulus for human tendons.

A C-fiber reflex modulated by heterotopic noxious somatic stimuli in the rat

1994 ◽  
Vol 72 (1) ◽  
pp. 194-213 ◽  
Author(s):  
S. Falinower ◽  
J. C. Willer ◽  
J. L. Junien ◽  
D. Le Bars
Keyword(s):  
Sural Nerve ◽  
Biceps Femoris ◽  
Reflex Response ◽  
Late Component ◽  
Biceps Femoris Muscle ◽  
Reflex Responses ◽  
C Fibers ◽  
Two Component ◽  
C Fiber ◽  
Femoris Muscle

1. Electromyographic recordings were made from the biceps femoris muscle through a pair of noninsulated platinum/iridium needle electrodes in male Sprague-Dawley rats artificially ventilated and anesthetized with 0.8% halothane in a N2O-O2 mixture (2/3:1/3). The animals' ventilation, heart rates, and body temperatures were continuously monitored. Electrical stimuli (2-ms duration, 0.16 Hz) were delivered to the sural nerve territory through a pair of noninsulated platinum/iridium needle electrode inserted subcutaneously in the medial aspect of the 4th and the lateral part of the 5th toe. Such stimulation elicited a two-component reflex response in the ipsilateral biceps femoris muscle: The first had a short latency (17.5 +/- 2.3 ms), short duration (20.7 +/- 2.6 ms), and low threshold (1.5 +/- 0.6 mA), whereas the second had a longer latency (162.4 +/- 5.1 ms), longer duration (202.3 +/- 6.2 ms), and higher threshold (5.7 +/- 0.5 mA). 2. Lidocaine (0.02–0.1%; 0.1 ml), but not saline, injected subcutaneously over the proximal part of the sural nerve, produced a selective depression of the late component of the reflex response, whereas the first component remained unchanged. The conduction velocity of the afferent fibers was estimated from the stimulation needles in the sural nerve territory to the nerve's projection in the lumbar spinal cord: it was concluded that the second, late component of the reflex response was due to afferent signals transmitted via unmyelinated C-fibers, whereas the first component was related to activation of fine myelinated fibers (A delta group). 3. Electrical stimulation of the sural nerve was still able to elicit the two-component reflex responses in the ipsilateral biceps femoris muscle of chronic spinal rats, indicating that these responses were genuine reflex responses, transmitted completely through a spinal circuit. 4. The C-fiber reflex was recorded when the duration and frequency of the stimuli applied to the sural nerve varied within the 0.5- to 4-ms and 0.02- to 1-Hz ranges, respectively. It was concluded that a single 2-ms duration shock at an intensity of 1.2 times the C-fiber reflex threshold, delivered every 6 s (0.16 Hz), constituted an acceptable and optimal protocol for experiments in which the C-fiber reflex was studied as a function of time. These parameters were used throughout the subsequent experiments.(ABSTRACT TRUNCATED AT 400 WORDS)

Sign in / Sign up

Export Citation Format

Share Document