Architectural and histochemical analysis of the semitendinousus muscle in mice, rats, guinea pigs, and rabbits

Roy, Roland R.; Powell, P. L.; Kanim, P.; Simpson, D. R.

doi:10.1002/jmor.1051810204

Cited by 34 publications

(20 citation statements)

References 24 publications

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“…We therefore performed histological analyses of the semitendinosus muscles at weaning. This muscle was chosen because fibres are arranged in parallel to the line of muscle (Roy et al 1984), and thus counting fibres within the mid belly region is a good indicator of the total number of muscle fibres that constitute this muscle. Results showed that the maternal cafeteria diet induced a marked reduction in the semitendinosus cross‐sectional area (approximately 25%) and in the number of fibres (approximately 20%) that formed in this muscle at weaning.…”

Section: Discussionmentioning

confidence: 99%

A maternal cafeteria diet during gestation and lactation promotes adiposity and impairs skeletal muscle development and metabolism in rat offspring at weaning

Bayol

Simbi

Stickland

2005

The Journal of Physiology

199

166

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We examined the effects of a maternal cafeteria diet on skeletal muscle and adipose tissue development in the offspring at weaning. Rats born to mothers fed the cafeteria diet either during gestation alone or during both gestation and lactation exhibited a 25% reduction in muscle cross-sectional area with approximately 20% fewer fibres compared with pups fed a balanced chow diet. Maintaining the cafeteria diet during lactation increased intramuscular lipid content and fat pad weights characterized by adipocyte hypertrophy but not hyperplasia. These pups also had elevated muscle IGF-1, IGF-1 receptor, and PPARγ mRNA levels, which may indicate an attempt to maintain normal insulin sensitivity. The increased adiposity and elevated IGF-1, IGF-1 receptor and PPARγ mRNAs were not seen in the pups rehabilitated to the balanced diet during lactation. However, these pups exhibited reduced muscle cell proliferation (PCNA) with reduced insulin receptor and a trend towards reduced glucose transporter (GLUT)-4 mRNAs when compared with pups fed a balanced chow diet, indicating possible alterations in glucose uptake by muscle tissue. Therefore, rats born to mothers fed a cafeteria diet during gestation alone or during both gestation and lactation exhibited impaired skeletal muscle development and metabolic disorders normally associated with insulin resistance as early as the weaning stage.

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Section: Discussionmentioning

confidence: 99%

A maternal cafeteria diet during gestation and lactation promotes adiposity and impairs skeletal muscle development and metabolism in rat offspring at weaning

Bayol

Simbi

Stickland

2005

The Journal of Physiology

199

166

View full text Add to dashboard Cite

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“…The cross-sectional area of muscles is often referred to as an indicator of the possible maximum force (Gans and Bock, 1965;Roy et al, 1984). However, it does not indicate the actual force developed by a muscle in various behaviors, because the actual force depends on the number, type, and size of recruiting motor units.…”

Section: Craniocaudal Specializationsmentioning

confidence: 99%

Architectural design, fiber‐type composition, and innervation of the rat rectus abdominis muscle

1992

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The rectus abdominis muscle is architecturally compartmentalized by tendinous intersections and is supplied by multiple thoracic nerves. In this study, the rectus abdominis of the rat has been qualitatively and quantitatively examined with regard to muscle dimensions, fiber organization, fiber-type composition, and innervation. The muscle exhibits architectural heterogeneity and different patterns of innervation among its thoracic, epigastric, and hypogastric parts. The epigastric part, adherent to the rectus sheath via tendinous intersections, represents relatively simple design. It is formed by serially arranged compartments with shorter fibers, compared with the other parts. These compartments are segmentally supplied by thoracic nerves. The hypogastric part is more complex, forms an interdigitation of muscular slips, and has segmental distribution of thoracic nerves in mediolateral direction. The thoracic part much differs from the other parts. It has smaller cross-sectional areas, compartments composed of abundant nonspanning fibers with intrafascicular termination, and non-segmental distribution of thoracic nerves. In addition to these craniocaudal specializations among the three parts, the muscle exhibits mediolateral differences in fiber-type composition. Slow-twitch oxidative fibers are more densely distributed in the medial half region than the lateral, whereas fast-twitch glycolytic fibers follow an inverse pattern. The mediolateral differences in fiber-type composition as well as the craniocaudal specializations in architectural design and innervation imply regionally differentiated recruitments of the muscle in various behaviors.

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“…to values obtained from postcranial muscles in other species [Spector et al, 1980;Powell et al, 1982;Roy et al, 1982] Bodine et al, 1982;Roy et al, 1984]. The force (F) produced by a muscle is estimated by 2 2 cos kg F kg c P PCS m m [Fick, 1910;Gans and Bock, 1965], where c is an estimate of the force produced by 1 cm 2 of muscle and P is the pinnation angle of the fibers in the muscle.…”

Section: Is the Percentage Of Bite Force Projected Along The Incisor mentioning

confidence: 99%

Functional Anatomy of Incisal Biting in <i>Aplodontia rufa</i> and Sciuromorph Rodents – Part 2: Sciuromorphy Is Efficacious for Production of Force at the Incisors

Druzinsky

2010

Cells Tissues Organs

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The protrogomorph condition of the rodent masticatory apparatus is thought to be present in only one living species, the mountain beaver Aplodontia rufa. The major anatomical difference between protrogomorphs and sciuromorphs is that the relative size of one part of the masseter muscle, the anterior lateral masseter, is much greater in sciuromorphs than in protrogomorphs. The mechanics of force production at the incisors were compared in A. rufa and six sciuromorph rodents. Is the sciuroid masticatory apparatus more effective for production of forces at the incisors during biting than the primitive, protrogomorph condition? To answer this question, three measures of mechanical ability were employed and three hypotheses were tested: (1) the mechanical advantage of the adductor musculature is greater in sciuromorphs than in A. rufa; (2) the relative force produced at the incisors is greater in sciuromorphs than in A. rufa, and (3) the relative amount of force produced that can be used to drive the incisors into an object, is greater in sciuromorphs than in A. rufa. The results demonstrated that the protrogomorph, A. rufa, is not as efficient at generating bite forces at the incisors as the sciuromorphs.

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Architectural and histochemical analysis of the semitendinousus muscle in mice, rats, guinea pigs, and rabbits

Cited by 34 publications

References 24 publications

A maternal cafeteria diet during gestation and lactation promotes adiposity and impairs skeletal muscle development and metabolism in rat offspring at weaning

A maternal cafeteria diet during gestation and lactation promotes adiposity and impairs skeletal muscle development and metabolism in rat offspring at weaning

Architectural design, fiber‐type composition, and innervation of the rat rectus abdominis muscle

Functional Anatomy of Incisal Biting in <i>Aplodontia rufa</i> and Sciuromorph Rodents – Part 2: Sciuromorphy Is Efficacious for Production of Force at the Incisors

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