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- W2170793212 endingPage "952" @default.
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- W2170793212 abstract "We hypothesized that muscles crossing the elbow have fundamental differences in their capacity for excursion, force generation, and moment generation due to differences in their architecture, moment arm, and the combination of their architecture and moment arm. Muscle fascicle length, sarcomere length, pennation angle, mass, and tendon displacement with elbow flexion were measured for the major elbow muscles in 10 upper extremity specimens. Optimal fascicle length, physiological cross-sectional area (PCSA), moment arm, operating range on the force–length curve, and moment-generating capacity were estimated from these data. Brachioradialis and pronator teres had the longest (17.7 cm) and shortest (5.5 cm) fascicles, respectively. Triceps brachii (combined heads) and brachioradialis had the greatest (14.9 cm2) and smallest (1.2 cm2) PCSAs, respectively. Despite a comparable fascicle length, long head of biceps brachii operates over a broader range of the force–length curve (length change=56% of optimal length, 12.8 cm) than the long head of triceps brachii (length change=28% of optimal length, 12.7 cm) because of its larger moment arm (4.7 cm vs. 2.3 cm). Although brachioradialis has a small PCSA, it has a relatively large moment-generating capacity (6.8 cm3) due to its large moment arm (average peak=7.7 cm). These results emphasize the need to consider the interplay of architecture and moment arm when evaluating the functional capabilities of a muscle." @default.
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- W2170793212 date "2000-08-01" @default.
- W2170793212 modified "2023-09-27" @default.
- W2170793212 title "The isometric functional capacity of muscles that cross the elbow" @default.
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- W2170793212 doi "https://doi.org/10.1016/s0021-9290(00)00051-8" @default.
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