A histochemical classification of muscle fibres based on three enzymes (ATPase, pre-inc. pH 4:35; succinic dehydrogenase and alpha-glycerol-phosphate-dehydrogenase) was used to describe postnatal growth and differentiation of muscle fibres. The m. soleus, m. plantaris and m. gastrocnemius were examined in normal mice from birth to the young adult stage. At birth, differentiation of the gastrocnemius muscle was in a more advanced stage than that of the plantaris and the soleus muscles, while the last of these was the least developed. During growth, as well as in the (young) adult, there was a distinct relation between fibre type and size, which, however, differed per muscle (region). The development of muscle fibres was a gradual process, rather than a succession of distinct stages, although a change in fibre type was often accompanied by a change in size. Differentiation of fibres already occurred perinatally, and the "adult fast' fibre types appeared during the second week postnatally, varying with the muscle region. During development, a percentage of fibres remained as a population that was histochemically and morphometrically intermediate between the fast-oxidative-glycolytic and fast-glycolytic adult fibres. A model is presented in which the most probable pathways of development are depicted.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1171796 | PMC |
Publication Analysis
Top Keywords
Similar Publications
Brachial Plexus Birth Injury: Treatment and Interventions.
Plast Surg (Oakv)
January 2025
Division of Plastic and Reconstructive Surgery, Saint Louis University Hospital, St. Louis, MO, USA.
Brachial plexus birth injury (BPBI) is a condition affecting newborns and involves damage to the nerve fibers compromising the brachial plexus during birth. Although most newborns recover spontaneously, a large subset require surgery to regain function, and others will have permanent disability despite intervention. Deciding when to pursue surgical intervention remains a challenge for clinicians treating BPBI.
View Article and Find Full Text PDFInfluence of puberty on high intensity exercise induced skeletal muscle damage and inflammatory response in sedentary boys.
Sports Med Health Sci
March 2025
Sports and Exercise Physiology Laboratory, Department of Physiology, University of Calcutta, University Colleges of Sciences and Technology, 92 A.P.C. Road, Kolkata, 700009, India.
The present investigation examined the influence of age and pubertal transition on magnitude of muscle damage and inflammatory response following high intensity incremental treadmill running till volitional exhaustion in sixty-four sedentary prepubertal ( = 32) and postpubertal ( = 32) boys who were randomly recruited in the study. Muscle damage and inflammatory markers like creatine kinase (CK), lactate dehydrogenase (LDH), alanine aminotransferase (ALT), aspartate aminotranferase (AST), C-Reactive Protein (CRP) and Interleukin-6 (IL-6) were estimated before and after exercise. Serum CK, LDH, AST, ALT, CRP and IL-6 levels significantly increased after exercise in both the groups in comparison to respective pre-exercise values.
View Article and Find Full Text PDFFrom molecular to physical function: The aging trajectory.
Curr Res Physiol
December 2024
Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada.
Aging is accompanied by a decline in muscle mass, strength, and physical function, a condition known as sarcopenia. Muscle disuse attributed to decreased physical activity, hospitalization, or illness (e.g.
View Article and Find Full Text PDFMuscle Fiber-Inspired High-Performance Strain Sensors for Motion Recognition and Control.
Langmuir
January 2025
Henan Province Engineering Technology Research Center of MEMS Manufacturing and Applications, School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China.
The rapid development of wearable technology, flexible electronics, and human-machine interaction has brought about revolutionary changes to the fields of motion analysis and physiological monitoring. Sensors for detecting human motion and physiological signals have become a hot topic of current research. Inspired by the muscle fiber structure, this paper proposed a highly stable strain sensor that was composed of stretchable Spandex fibers (SPF), multiwalled carbon nanotubes (MWCNTs), and silicone rubber (Ecoflex).
View Article and Find Full Text PDFLocal Inflammation Precedes Diaphragm Wasting and Fibrotic Remodelling in a Mouse Model of Pancreatic Cancer.
J Cachexia Sarcopenia Muscle
February 2025
Department of Physical Therapy, University of Florida Health Cancer Center, Gainesville, Florida, USA.
Background: Cancer cachexia represents a debilitating muscle wasting condition that is highly prevalent in gastrointestinal cancers, including pancreatic ductal adenocarcinoma (PDAC). Cachexia is estimated to contribute to ~30% of cancer-related deaths, with deterioration of respiratory muscles suspected to be a key contributor to cachexia-associated morbidity and mortality. In recent studies, we identified fibrotic remodelling of respiratory accessory muscles as a key feature of human PDAC cachexia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!