Ultrastructural and immunocytochemical study on normal human palmar aponeuroses

Contri, M. Baccarani; Guerra, Deanna; Vignali, Nicoletta; Taparelli, F.; Marcuzzi, A.; Caroli, A.; Ronchetti, Ivonne Pasquali

doi:10.1002/ar.1092400304

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The magnitude of this force deficit is a function of strain and the work done to stretch the contractile component (CC) of muscle (8). The aponeurosis (intramuscular tendon) and the tendon, composed chiefly of type I and III collagen (12,22,27), form the series elastic component (SEC) of muscle (23). A positive correlation exists between the collagen content and stiffness of a muscle (16,19,48).…”

Section: Discussionmentioning

confidence: 99%

Contractile properties of EDL and soleus muscles of myostatin-deficient mice

Mendias¹,

Marcin²,

Calerdon³

et al. 2006

Journal of Applied Physiology

131

158

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Myostatin is a negative regulator of muscle mass. The impact of myostatin deficiency on the contractile properties of healthy muscles has not been determined. We hypothesized that myostatin deficiency would increase the maximum tetanic force (P(o)), but decrease the specific P(o) (sP(o)) of muscles and increase the susceptibility to contraction-induced injury. The in vitro contractile properties of extensor digitorum longus (EDL) and soleus muscles from wild-type (MSTN(+/+)), heterozygous-null (MSTN(+/-)), and homozygous-null (MSTN(-/-)) adult male mice were determined. For EDL muscles, the P(o) of both MSTN(+/-) and MSTN(-/-) mice were greater than the P(o) of MSTN(+/+) mice. For soleus muscles, the P(o) of MSTN(-/-) mice was greater than that of MSTN(+/+) mice. The sP(o) of EDL muscles of MSTN(-/-) mice was less than that of MSTN(+/+) mice. For soleus muscles, however, no difference in sP(o) was observed. Following two lengthening contractions, EDL muscles from MSTN(-/-) mice had a greater force deficit than that of MSTN(+/+) or MSTN(+/-) mice, whereas no differences were observed for the force deficits of soleus muscles. Myostatin-deficient EDL muscles had less hydroxyproline, and myostatin directly increased type I collagen mRNA expression and protein content. The difference in the response of EDL and soleus muscles to myostatin may arise from differences in the levels of a myostatin receptor, activin type IIB. Compared with the soleus, the amount of activin type IIB receptor was approximately twofold greater in EDL muscles. The results support a significant role for myostatin not only in the mass of muscles but also in the contractility and the composition of the extracellular matrix of muscles.

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Section: Discussionmentioning

confidence: 99%

Contractile properties of EDL and soleus muscles of myostatin-deficient mice

Mendias¹,

Marcin²,

Calerdon³

et al. 2006

Journal of Applied Physiology

131

158

View full text Add to dashboard Cite

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“…Similarly, based on the evidence of their study on bioptic samples from normal subjects of different ages by means of optical and electron microscopic analyses and by immunocytochemistry (12). Also, Contri et al indicated that normal aponeurotic cells cannot be regarded as typical tenocytes (13).…”

Section: Discussionmentioning

confidence: 99%

Ultrasonograpic Assessment of Relationship Between the Palmaris Longus Tendon and the Flexor Retinacular Ligament and the Palmar Aponeurosis of the Hand

et al. 2010

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“…Recent histological studies suggest that the plantar fascia is histologically distinct from tendons and ligaments. 28,29 Plantar fasciitis involves predominantly the proximal insertion of the aponeurosis (enthesis) 30,31 The enthesis consist of 4 zones: dense fi brous collagenous tissue, uncalcifi ed fi rbrocartilage, calcifi ed fi brocartilage and bone. 32,33 The prevalence of fi brocartilage insertions in areas which experience stress in more than one degree of freedom [34][35][36] suggests that entheses are specifi cally adapted to shearing and bending forces.…”

Section: Discussionmentioning

confidence: 99%

Comparative Trial of the Foot Pressure Patterns between Corrective Orthotics, Formthotics, Bone Spur Pads and Flat Insoles in Patients with Chronic Plantar Fasciitis

Chia

Suresh

Kuah

et al. 2009

Ann Acad Med Singap

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Introduction: The objective of the study is to compare the efficacy of flat insoles, bone spur pads, pre-fabricated orthotics and customised orthotics in reducing plantar contact pressure of subjects with plantar fasciitis. Materials and Methods: This is a controlled non-blinded com- parative study conducted in a tertiary medical institute. Thirty subjects with unilateral plantar fasciitis between the ages of 20 and 65 years were recruited at the sports medicine clinic. The contact pressures and pressure distribution patterns in both feet for each subject were measured with sensor pressure mats while standing. Repeat measurements were made with the subjects wearing shoes, flat insoles, bone spur heel pads, pre-fabricated insoles and customised orthotics on both feet. The asymptomatic side was used as the control. Contact pressure measurements of the symptomatic and asymptomatic feet and power ratio of the pressure distribution pattern of the rearfoot were then compared. Results: Contact pressure was higher on the asymptomatic side due to unequal distribution of weight. Bone spur heel pads were ineffective in reducing rearfoot pressure while formthotics and customised orthotics reduced peak rearfoot pressures significantly. The power ratio of the rearfoot region decreased with the use of formthotics and customised orthotics. Conclusion: Pre-fabricated orthotics and customised orthotics reduced rearfoot peak forces on both sides while bone spurs heel pad increase rearfoot peak pressures. Pre-fabricated and customised orthotics are useful in distributing pressure uniformly over the rearfoot region. Key words: Biomechanics, Heel pain

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Ultrastructural and immunocytochemical study on normal human palmar aponeuroses

Cited by 6 publications

References 28 publications

Contractile properties of EDL and soleus muscles of myostatin-deficient mice

Contractile properties of EDL and soleus muscles of myostatin-deficient mice

Ultrasonograpic Assessment of Relationship Between the Palmaris Longus Tendon and the Flexor Retinacular Ligament and the Palmar Aponeurosis of the Hand

Comparative Trial of the Foot Pressure Patterns between Corrective Orthotics, Formthotics, Bone Spur Pads and Flat Insoles in Patients with Chronic Plantar Fasciitis

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