Data on the distribution of fibre types in thirty-six human muscles

Johnson, Margaret; Polgár, J. P.; Weightman, D.; Appleton, David R.

doi:10.1016/0022-510x(73)90023-3

Cited by 1,980 publications

(1,327 citation statements)

References 9 publications

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“…The maximal shortening velocity of fascicle depends on the length of fascicle (here cancelled out by the normalization; Wickiewicz et al 1984) and the proportion of fast-twitch fibres (Barany 1967). Thus, considering the almost similar proportion of fast-twitch fibres in both muscles (Johnson et al 1973), our results are consistent.…”

Section: Estimation Of Maximal Knee Joint Velocity and Muscle Fasciclsupporting

confidence: 78%

Muscle fascicle shortening behaviour of vastus lateralis during a maximal force–velocity test

et al. 2017

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medialis in two previous studies. Moreover, this contribution of muscle fascicles shortening velocity was constant whatever the velocity condition, even at the highest reachable velocity. Thus, the vastus lateralis fascicles shortening velocity increases linearly with the knee joint velocity until high velocities and its behaviour strongly accorded with the classical Hill's force-velocity relationship.

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Section: Estimation Of Maximal Knee Joint Velocity and Muscle Fasciclsupporting

confidence: 78%

Muscle fascicle shortening behaviour of vastus lateralis during a maximal force–velocity test

et al. 2017

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“…It has been reported that the vastus medialis muscle contains more type II muscle fibres than the adductor pollicis muscle. 10 As the percentage of type II muscle fibres increases, the skeletal muscle becomes more resistant to a non-depolarizing neuromuscular relaxant and recovery from neuromuscular blockade is hastened. 1,[5][6][7][8] Because the vastus medialis muscle is thought to be more resistant to non-depolarizing neuromuscular blocking drugs than the adductor pollicis muscle, TOFR assessed over the vastus medialis muscle was higher than that measured at the thumb.…”

Section: P-ptc S-ptc P-tof S-tofmentioning

confidence: 99%

RETRACTED ARTICLE: Le blocage neuromusculaire peut être évalué par accélérographie sur le muscle vaste interne chez des patients en décubitus ventral

et al. 2003

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P Pu ur rp po os se e: : To study accelerographic monitoring of neuromuscular blockade over the vastus medialis muscle in anesthetized patients in the prone position.M Me et th ho od ds s: : Sixty adult patients were divided into four groups of 15: prone (P)-post-tetanic count (PTC), P-train-of-four (TOF), supine (S)-PTC or S-TOF group. In the P-PTC and P-TOF groups, the muscular branch of the femoral nerve was stimulated and the movement of the vastus medialis muscle was measured accelerographically. In the S-PTC and S-TOF groups, the depth of neuromuscular blockade was assessed mechanically at the thumb. After administration of vecuronium 0.1 mg·kg -1 , TOF stimuli were delivered every 20 sec in all groups. Onset of neuromuscular blockade (time from vecuronium to the minimum level of T1 (first response of TOF) was compared between the P-PTC or P-TOF group and S-PTC or S-TOF group. Recoveries of PTC and those of TOF were compared between the P-PTC and S-PTC groups and P-TOF and S-TOF groups, respectively. R Re es su ul lt ts s: : Onset of neuromuscular blockade in the P-PTC or P-TOF group was shorter than in the S-PTC or S-TOF group (132 ± 43 vs 233 ± 40 sec, mean ± SD, P < 0.001). Recoveries of PTC in the P-PTC and S-PTC groups followed a similar time course. Recoveries of T1/control in the P-TOF and S-TOF groups were also comparable. In contrast, train-of-four ratio (T4/T1, TOFR) in the P-TOF group was higher than in the S-TOF group 60-120 min after vecuronium (P < 0.05).C Co on nc cl lu us si io on ns s: : The degree of neuromuscular blockade can be assessed accelerographically over the vastus medialis muscle even when patients are in the prone position. When evaluated accelerographically over the vastus medialis muscle, onset of neuromuscular blockade is quicker and TOFR is higher than that assessed at the thumb.Objectif : Étudier la mesure accélérographique du blocage neuromusculaire du muscle vaste interne chez des patients anesthésiés en décubitus ventral. moyenne ± l'écart type, P < 0,001 Méthode : Soixante adultes ont été répartis en quatre groupes de 15 : compte post-tétanique en décubitus ventral (CPT-V), train-de-quatre-V (TDQ-V), CPT-D en décubitus dorsal ou TDQ-D. Dans les groupes CPT-V et TDQ-V, la branche musculaire du nerf fémoral a été stimulée et le mouvement du muscle vaste interne mesuré par accélérographie. Dans les groupes CPT-D et TDQ-D, la profondeur du blocage neuromusculaire a été évaluée mécaniquement au pouce. Après l'administration de 0,1 mg·kg -1 de vécuronium, des stimuli en TDQ ont été administrés à toutes les 20 sec chez tous les patients. L'installation du bloc, c'est-à-dire le temps entre l'administration du vécuronium et le niveau minimal de T1 (première réponse au TDQ), a été comparée entre les groupes CPT-V ou TDQ-V et les groupes CPT-D et TDQ-D. La récupération du CPT et celle du TDQ ont été respectivement comparées entre CPT-V et CPT-D et entre TDQ-V et TDQ-D. Résultats: L'installation du bloc dans le groupe CPT-V ou TDQ-V a été plus courte que dans le groupe

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“…With comparable patient characteristics, other factors seem to be more important in causing the discrepancies between the studies. In the above-mentioned studies, three different muscles were investigated, which differ greatly in structure and function, tibialis anterior muscle being primarily a postural muscle containing a high percentage of slow, type I muscle fibres (70%), deltoid muscle having both tonic and phasic activity and containing 50±60% type I muscle fibres, and quadriceps femoris muscle being primarily a locomotor muscle containing only 40% type I muscle fibres [28].…”

Section: Discussionmentioning

confidence: 99%

Muscle metabolic status in patients with severe COPD with and without long-term prednisolone

Pouw¹,

Lang²,

Gosker³

et al. 2000

Eur Respir J

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Both abnormalities in high energy phosphate metabolism and a decreased oxidative enzyme capacity have been reported in skeletal muscle of stable chronic obstructive pulmonary disease (COPD) patients. The first aim of this study was to investigate whether these findings are present in anterior tibialis muscle and whether or not they are associated. Abnormalities in mitochondrial structure and function as well as signs of myopathy have been found during corticosteroid treatment. The second aim of this study, therefore, was to investigate whether in COPD patients prolonged use of low dose prednisolone has effects on muscle energy metabolism and qualitative morphology.In a cross-sectional study 15 COPD patients (forced expiratory volume in one second (FEV1) 33 9 (mean SD) % predicted) who were steroid-naive (CORT-) were compared with 10 healthy control subjects (HC) and with 14 COPD patients (FEV1 30 11 % pred), who had been using oral prednisolone for at least 1 yr (CORT+).It was found that adenosine triphosphate (ATP)/adenosine diphosphate was lower in CORT-compared to HC (5.7 versus 6.2, p=0.03). Inosine monophosphate was detected in 13 of 15 CORT-compared to 3 of 10 HC (p=0.004). However, although indications were found for an imbalance in production and utilization of ATP, comparing CORT-and HC, no differences in oxidative (citrate synthase and 3-hydroxy-acylcoenzyme A dehydrogenase) and glycolytic (hexokinase, lactate dehydrogenase and phosphofructokinase) enzyme capacities were found.When, comparing steroid-treated and steroid-naive patient subgroups, no differences in the above mentioned parameters of muscle energy metabolism and of muscle qualitative morphology were found. Eur Respir J 2000; 16: 247±252. Supported by a scholarship from ASTRA BV, the Netherlands.Exercise intolerance and dyspnoea are the most frequently occurring complaints in patients with severe chronic obstructive pulmonary disease (COPD). Weakness of both skeletal and respiratory muscles contributes significantly to these complaints [1]. Recently it has been shown that muscle weakness in COPD patients can predominantly be explained by muscle atrophy [2]. However, several studies suggested that exercise tolerance might also be impaired by alterations in muscle energy metabolism [3±5].Experimental evidence is accumulating that in COPD patients muscle energy metabolism is already disturbed at rest. JAKOBSSON et al. [6] found a decreased oxidative capacity and an increased glycolytic capacity in quadriceps femoris muscle. MALTAIS et al.[3] reported a decreased oxidative capacity in quadriceps femoris muscle. In another recent study [4], in tibialis anterior muscle, indications for an imbalance in adenosine triphosphate (ATP) utilization and resynthesis were found, as suggested by increased inosine monophosphate (IMP) levels, which were negatively related with ATP/adenosine diphosphate (ADP) ratios. However, in that study oxidative and glycolytic enzyme capacities were not investigated.In view of the above mentioned findings in skel...

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Data on the distribution of fibre types in thirty-six human muscles

Cited by 1,980 publications

References 9 publications

Muscle fascicle shortening behaviour of vastus lateralis during a maximal force–velocity test

Muscle fascicle shortening behaviour of vastus lateralis during a maximal force–velocity test

RETRACTED ARTICLE: Le blocage neuromusculaire peut être évalué par accélérographie sur le muscle vaste interne chez des patients en décubitus ventral

Muscle metabolic status in patients with severe COPD with and without long-term prednisolone

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