Intensity of light diffraction from striated muscle as a function of incident angle

Baskin, Ronald J.; Lieber, Richard L.; Ôba, Toshiharu; Yeh, Yung‐Hsin

doi:10.1016/s0006-3495(81)84764-9

Cited by 30 publications

(28 citation statements)

References 6 publications

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“…The length of each fascicle was measured and the mean of the 10 fascicles was determined. Sarcomere lengths were estimated using laser diffraction (Yeh et al, 1980;Baskin et al, 1981;Lieber et al, 1990) and the protocol described by Murray et al (2000). Each fascicle was divided into three regions: proximal, middle, and distal.…”

Section: Methodsmentioning

confidence: 99%

Architecture of the rectus abdominis, quadratus lumborum, and erector spinae

Delp

Sajja

Murray

et al. 2001

Journal of Biomechanics

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Quantitative descriptions of muscle architecture are needed to characterize the force-generating capabilities of muscles. This study reports the architecture of three major trunk muscles: the rectus abdominis, quadratus lumborum, and three columns of the erector spinae (spinalis thoracis, longissimus thoracis and iliocostalis lumborum). Musculotendon lengths, muscle lengths, fascicle lengths, sarcomere lengths, pennation angles, and muscle masses were measured in five cadavers. Optimal fascicle lengths (the fascicle length at which the muscle generates maximum force) and physiologic cross-sectional areas (the ratio of muscle volume to optimal fascicle length) were computed from these measurements. The rectus abdominis had the longest fascicles of the muscles studied, with a mean (S.D.) optimal fascicle length of 28.3 (4.2) cm. The three columns of the erector spinae had mean optimal fascicle lengths that ranged from 6.4 (0.6) cm in the spinalis thoracis to 14.2 (2.1) cm in the iliocostalis lumborum. The proximal portion of the quadratus lumborum had a mean optimal fascicle length of 8.5 (1.5) cm and the distal segment of this muscle had a mean optimal fascicle length of 5.6 (0.9) cm. The physiologic cross-sectional area of the rectus abdominis was 2.6 (0.9) cm 2 , the combined physiologic cross-sectional area of the erector spinae was 11.6 (1.8) cm 2 , and the physiologic cross-sectional area of the quadratus lumborum was 2.8 (0.5) cm 2 . These data provide the basis for estimation of the force-generating potential of these muscles. #

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Section: Methodsmentioning

confidence: 99%

Architecture of the rectus abdominis, quadratus lumborum, and erector spinae

Delp

Sajja

Murray

et al. 2001

Journal of Biomechanics

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“…It has been argued that this technique may be insensitive to the "relatively few" sarcomeres in the end region that can determine the magnitude ofthe tension generated during isometric contraction (Julian and Moss, 1980). This laboratory has studied the physical basis of laser diffraction and its value as a tool for monitoring sarcomere length (Yeh et al, 1980 ; Baskin et al, 1981 ;Lieber et al, 1983a) . The purpose of the present study was to monitor the end and center sarcomere regions during fixed-end tetani to measure directly the sarcomere length changes in different areas of the fiber.…”

Section: Introductionmentioning

confidence: 99%

Intersarcomere dynamics of single muscle fibers during fixed-end tetani.

Lieber¹,

Baskin²

1983

The Journal of General Physiology

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The contraction dynamics of end and center regions of single fibers have been measured during fixed-end tetani . Experimental control and data acquisition are provided by a digital system that can acquire diffraction data as fast as every 260 jus for 300-700 ms. Tension records are simultaneously displayed on a storage oscilloscope. Resting sarcomere length variation between the end and center regions was analogous to that of Gordon et al . (1966) . During the rapid rise in force (<45 ms), the end regions contract almost twice as fast as the center regions. During the slow rise in force, the velocity of contraction of the end regions was 3.8 times the velocity of stretch of the center regions. In addition, factors that affected the rate and extent of the slow rise in tension also affected the rate and extent of end shortening. In 58% of the cases studied, the amount of shortening observed in the end region was enough to explain the extent of the slow rise in tension. These data support the explanation of creep first proposed by A. V. Hill (1953) and used by Gordon et al . (1966) to justify their use of the back-extrapolation technique in measuring the isometric force-generating capability of a single fiber. These data also indicate that the laser diffraction technique may provide an effective, noninvasive method for studying sarcomere dynamics during creep and related phenomena.

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“…Therefore multiple domain effects were unlikely to be significant [21]. When a larger incident beam with a 1 mm diameter was used, the scan showed obtained much wider distributions as observed by Rudel and Zite-Ferenczy [5] and Baskin et al [40]. In Rudel and Zite-Ferenczy's study, a thick ͑150 m͒ frog (Rana esculenta) muscle fiber with a sarcomere length of 2.6 m was used (Fig.…”

Section: A Diffraction Efficiencies As a Function Of Incidence Anglementioning

confidence: 75%

“…The first category is related to the Bragg diffraction phenomenon [5,12,21,23,40]. In such studies, diffraction efficiencies were measured as a function of incidence angles ( scan).…”

Section: Resultsmentioning

confidence: 99%

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Effects of inhomogeneous myofibril morphology on optical diffraction in single muscle fibers

Ranasinghesagara

Yao

2008

J. Opt. Soc. Am. A

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Laser diffraction is commonly used in physiological research that explores single muscle fibers. Although variations in sarcomere morphological properties have often been observed, their effects on laser diffraction have not been studied in detail. In this study, we applied three-dimensional coupled wave theory to a physical sarcomere model to investigate the effects of inhomogeneous morphological profiles in muscle fibers. The simulation results were compared with several those of published experimental studies. Our results indicate that by incorporating various myofibril inhomogeneities such as skew and domain effect in the theoretical model, a variety of observations in single fiber diffraction under different experimental conditions can be reproduced in the simulation.

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Intensity of light diffraction from striated muscle as a function of incident angle

Cited by 30 publications

References 6 publications

Architecture of the rectus abdominis, quadratus lumborum, and erector spinae

Architecture of the rectus abdominis, quadratus lumborum, and erector spinae

Intersarcomere dynamics of single muscle fibers during fixed-end tetani.

Effects of inhomogeneous myofibril morphology on optical diffraction in single muscle fibers

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