In vivo force-length and activation dynamics of two distal rat hindlimb muscles in relation to gait and grade Article Swipe
Carolyn M. Eng
,
Nicolai Konow
,
Chris Tijs
,
Natalie Holt
,
Andrew A. Biewener
·
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1242/jeb.205559
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1242/jeb.205559
Muscle function changes to meet the varying mechanical demands of locomotion across different gait and grade conditions. A muscle's work output is determined by time-varying patterns of neuromuscular activation, muscle force and muscle length change, but how these patterns change under different conditions in small animals is not well-defined. Here we report the first integrated in vivo force-length and activation patterns in rats, a commonly used small animal model, to evaluate the dynamics of two distal hindlimb muscles (medial gastrocnemius, MG and plantaris, PL) across a range of gait (walk, trot, and gallop) and grade (level versus incline) conditions. We use these data to explore how the pattern of force production, muscle activation and muscle length changes across conditions in a small quadrupedal mammal. As hypothesized, we found that the rat muscles show limited fascicle strains during active force generation in stance across gaits and grades, indicating that these distal rat muscles generate force economically but perform little work, similar to patterns observed in larger animals during level locomotion. Additionally, given differences in fiber type composition and variation in motor unit recruitment across the gait and grade conditions examined here for these muscles, the in vivo force-length behavior and neuromuscular activation data reported here can be used to validate improved two-element Hill-type muscle models.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1242/jeb.205559
- https://jeb.biologists.org/content/jexbio/222/24/jeb205559.full.pdf
- OA Status
- bronze
- Cited By
- 16
- References
- 49
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2990976202
All OpenAlex metadata
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https://openalex.org/W2990976202Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1242/jeb.205559Digital Object Identifier
- Title
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In vivo force-length and activation dynamics of two distal rat hindlimb muscles in relation to gait and gradeWork title
- Type
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articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2019Year of publication
- Publication date
-
2019-01-01Full publication date if available
- Authors
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Carolyn M. Eng, Nicolai Konow, Chris Tijs, Natalie Holt, Andrew A. BiewenerList of authors in order
- Landing page
-
https://doi.org/10.1242/jeb.205559Publisher landing page
- PDF URL
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https://jeb.biologists.org/content/jexbio/222/24/jeb205559.full.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
- OA URL
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https://jeb.biologists.org/content/jexbio/222/24/jeb205559.full.pdfDirect OA link when available
- Concepts
-
Quadrupedalism, Hindlimb, Fascicle, Gait, Anatomy, Work (physics), Muscle contraction, Gastrocnemius muscle, In vivo, Forelimb, Biology, Skeletal muscle, Physical medicine and rehabilitation, Medicine, Physics, Thermodynamics, BiotechnologyTop concepts (fields/topics) attached by OpenAlex
- Cited by
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16Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 2, 2024: 2, 2023: 4, 2022: 2, 2021: 5Per-year citation counts (last 5 years)
- References (count)
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49Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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