Regulation of sarcomere number in skeletal muscle: A comparison of hypotheses

Herring, Susan W.; Grimm, Arthur F.; Grimm, B. R.

doi:10.1002/mus.880070213

Cited by 135 publications

(80 citation statements)

References 33 publications

(2 reference statements)

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“…The functional length of a muscle is important to influence on its contractile properties [18][19][20] and to determine if the muscle adds or loses sarcomeres 20,21 . In the present study, only the immobilized and stretched group with previous therapeutic ultrasound with 0.5W/cm 2 dose did not present statistically significant difference concerning the quantity of sarcomeres in series and muscular length, when compared with the immobilized and non-immobilized muscles were compared; that is to say, this dose associated with stretching presented positive effects concerning recovery of the deleterious effects caused by immobilization.…”

Section: Discussionmentioning

confidence: 99%

Efeitos do ultrassom terapêutico associados ao alongamento estático sobre parâmetros histomorfométricos longitudinais de sóleos imobilizados de ratos

Artifon

Ferrari

Cunha

et al. 2012

Rev Bras Med Esporte

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The muscle tissue is endowed with plasticity that adapts to different stimuli. Immobilization causes damage to the musculature including atrophy, loss of muscle strength and extensibility. The stretching and ultrasound treatment modalities are used to speed up muscle repair process as they can increase protein synthesis and improve extensibility. Objective: To compare the use of therapeutic thermal and non thermal ultrasound, associated with stretching, in the remobilization of the soleus muscle of rats subjected to position of muscle shortening on aspects histomorphometric longitudinal muscle. Methods: 28 rats were immobilized for 15 days, later released from the apparatus and divided into four groups: group AG only remobilized by stretching for 10 days and the others were subjected to 10 days of therapeutic intervention 1MHz of ultrasound at 1.0W/cm² (GAUS 1.0), 0.5W/cm² (GAUS 0.5), and 0.2 W/cm² (GAUS 0.2), and further stretching to the soleus. At the end of treatment, the animals were sacrificed and their soleus muscles were removed for later histological analysis of longitudinal parameters (count of sarcomeres). Results: At intragroup analysis on the muscle length, only the group GAUS 0.5 did not present significant difference. The count of sarcomeres in the groups GA and GAUS 0.2 was statistically different. The size of the sarcomeres in both groups had no statistically significant difference. In inter-group analysis both groups had no statistically significant difference for any of the variables. Conclusion: The stretching was insufficient to reverse the effects of immobilization. When associated with therapeutic ultrasound, the dose 0.5 W/cm² recovered muscle length significantly, and the doses 1.0 and 0.5 W/cm² contributed to the significant increase of the number of sarcomeres in immobilized muscles.

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Section: Discussionmentioning

confidence: 99%

Efeitos do ultrassom terapêutico associados ao alongamento estático sobre parâmetros histomorfométricos longitudinais de sóleos imobilizados de ratos

Artifon

Ferrari

Cunha

et al. 2012

Rev Bras Med Esporte

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“…This research focus is appropriate given that food mechanical properties can modulate both jaw-muscle activity (Agrawal et al, 1998;Woda et al, 2006) and bone loading (Hylander, 1979) during ingestion and mastication. Alternatively, studies of sarcomere lengths in mammalian jaw muscles often focus on physiological relationships such as how manipulated or representative jaw movements impact sarcomere length and, hence, peak muscle forces (Anapol and Herring, 1989;Carlson, 1977;Herring et al, 1984;Mackenna and Turker, 1978;Nordstrom et al, 1974;Thexton and Hiiemae, 1975;Weijs et al, 1989;Weijs and van der Wielen-Drent, 1983;Weijs et al, 1982). The lack of behavioral and ecological specificity in these studies makes it more difficult to understand the implications of sarcomere length variation for mammalian jaw-muscle evolution.…”

Section: Introductionmentioning

confidence: 99%

The morphology of the masticatory apparatus facilitates muscle force production at wide jaw gapes in tree-gouging common marmosets (Callithrix jacchus)

Eng

Ward

Vinyard

et al. 2009

Journal of Experimental Biology

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SUMMARYCommon marmosets (Callithrix jacchus) generate wide jaw gapes when gouging trees with their anterior teeth to elicit tree exudate flow. Closely related cotton-top tamarins (Saguinus oedipus) do not gouge trees but share similar diets including exudates. Maximizing jaw opening theoretically compromises the bite forces that marmosets can generate during gouging. To investigate how jaw-muscle architecture and craniofacial position impact muscle performance during gouging, we combine skull and jaw-muscle architectural features to model muscle force production across a range of jaw gapes in these two species. We incorporate joint mechanics, resting sarcomere length and muscle architecture estimates from the masseter and temporalis to model muscle excursion, sarcomere length and relative tension as a function of joint angle. Muscle excursion from occlusion to an estimated maximum functional gape of 55deg. was smaller in all regions of the masseter and temporalis of C. jacchus compared with S. oedipus except the posterior temporalis. As a consequence of reduced muscle excursion distributed over more sarcomeres in series (i.e. longer fibers), sarcomere length operating ranges are smaller in C. jacchus jaw muscles across this range of gapes. This configuration allows C. jacchus to act on a more favorable portion of the length-tension curve at larger gapes and thereby generate relatively greater tension in these muscles compared with S. oedipus. Our results suggest that biting performance during tree gouging in common marmosets is improved by a musculoskeletal configuration that reduces muscle stretch at wide gapes while simultaneously facilitating comparatively large muscle forces at the extremes of jaw opening.

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“…On the other hand, muscle attachment located on the clavicle has more variety [18]. Thus, it seems that muscle length determines motion range to the greatest extent, while its architecture determines muscle function and motion control [16,26,41]. Muscle formation, including such parameters as the length of its contractile part, tendon length or attachment width, depends both on genetic factors and on the type of work it does [16,17,31,41].…”

Section: Discussionmentioning

confidence: 99%

Morphology and a proposed model of innervation of the human deltoid muscle: a pilot study

Wysiadecki

Polguj²,

Krasucki³

et al. 2014

Folia Morphol

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Background:The deltoid muscle (DM) anterior fibres) and by pbAN (posterior fibres), and variation II, in which the spinal part did not have double innervation -the abAN innervation area covered only the acromial and clavicular parts, and the entire spinal part was supplied by pbAN. Both variations had a segmented arrangement of sub-branches reaching individual parts of the DM, which was particularly distinct in the clavicular Conclusions:The study confirmed the existence of a characteristic segmented innervation scheme of the DM which corresponds with the segmented morphology of its individual parts. An analysis of the internal structure of the muscle specific architectonics based on the tendon system was also presented. (Folia Morphol 2014; 73, 2: 216-223)

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Regulation of sarcomere number in skeletal muscle: A comparison of hypotheses

Cited by 135 publications

References 33 publications

Efeitos do ultrassom terapêutico associados ao alongamento estático sobre parâmetros histomorfométricos longitudinais de sóleos imobilizados de ratos

Efeitos do ultrassom terapêutico associados ao alongamento estático sobre parâmetros histomorfométricos longitudinais de sóleos imobilizados de ratos

The morphology of the masticatory apparatus facilitates muscle force production at wide jaw gapes in tree-gouging common marmosets (Callithrix jacchus)

Morphology and a proposed model of innervation of the human deltoid muscle: a pilot study

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