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  Muscle force interacts with stature to influence functionally related polar second moments of area in the lower limb among adult women

Murray, A. A., & Stock, J. T. (2020). Muscle force interacts with stature to influence functionally related polar second moments of area in the lower limb among adult women. American Journal of Physical Anthropology, n/a(n/a): 24097. doi:10.1002/ajpa.24097.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-CEB9-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CEBF-C
Genre: Journal Article

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 Creators:
Murray, Alison A., Author
Stock, Jay T.1, Author              
Affiliations:
1Archaeology, Max Planck Institute for the Science of Human History, Max Planck Society, ou_2074312              

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Free keywords: body size, cross-sectional geometry, muscle force, skeletal muscle
 Abstract: Objectives: We sought to determine the relationships between muscle size, function, and polar second moments of area (J) at the midshaft femur, proximal tibia, and midshaft tibia. - Materials and Methods: We used peripheral quantitative computed tomography to quantify right femoral and tibial J and soft tissue cross-sectional areas, and force plate mechanography to quantify peak power output and maximum force of the right limb, among athletic women and control subjects. - Results: Lower limb bone J exhibited strong relationships with estimated force but not power between both groups. Among controls, the strongest relationships between force and J were found at the midshaft femur. Among athletes, these relationships shifted to the tibia, regardless of body size, likely reflecting functional strain related to the major knee extensors and ankle plantarflexors. Together, muscle force and stature explained as much as 82 and 48% of the variance in lower limb bone J among controls and athletes, respectively. - Discussion: Results highlight the importance of considering relevant muscle function variables (e.g., force and lever arm lengths) when interpreting behavioral signatures from skeletal remains. Future work to improve the estimation of muscle force from skeletal remains, and incorporate it with lever arm length into analyses, is warranted. Results also suggest that, in doing so, functional relationships between a given section location and musculature should be considered.

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Language(s): eng - English
 Dates: 2020-07-31
 Publication Status: Published online
 Pages: 18
 Publishing info: -
 Table of Contents: 1. Introduction
1.1. Behavioral signals in lower limb bone crosssectional geometry
1.2. The functional interaction of body size, composition, and cross-sectional geometry
1.3. Objectives

2. Methods
2.1. Participants
2.2. Anthropometry
2.3. Bone, muscle, and fat cross-sectional parameters
2.4. Whole-limb performance parameters
2.5. Statistical analyses

3. Results
3.1. Body size
3.2. Soft tissue areas
3.3. Whole-limb force and power production
3.4. Explanatory power of MCSAs and whole-limb performance variables: Control subjects
3.5. Explanatory power of MCSAs and dynamic performance variables: Athletes

4. Discussion
4.1. Muscle force production is significantly associated with functionally related lower limb bone polar second moments of area
4.2. Considering the interaction between muscle force and stature when interpreting cross-sectional geometry

5. Conclusion
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/ajpa.24097
Other: shh2675
 Degree: -

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Title: American Journal of Physical Anthropology
  Abbreviation : Am J Phys Anthropol
Source Genre: Journal
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Publ. Info: New York, NY : Wiley-Liss, Inc.
Pages: - Volume / Issue: n/a (n/a) Sequence Number: 24097 Start / End Page: - Identifier: ISSN: 0002-9483
CoNE: https://pure.mpg.de/cone/journals/resource/954926960915