干旱区生态环境知识资源中心(Arid): Plantar flexor muscles of kangaroo rats (Dipodomys deserti) shorten at a velocity to produce optimal power during jumping

Arid

DOI	10.1242/jeb.242630
	Plantar flexor muscles of kangaroo rats (Dipodomys deserti) shorten at a velocity to produce optimal power during jumping
	Schwaner, M. Janneke; Lin, David C.; McGowan, Craig P.
通讯作者	Schwaner, MJ (corresponding author)，Univ Idaho, Dept Biol Sci, Moscow, ID 83844 USA.
来源期刊	JOURNAL OF EXPERIMENTAL BIOLOGY
ISSN	0022-0949
EISSN	1477-9145
出版年	2021
卷号	224 期号:24
英文摘要	The musculotendon work contributions across all joints during jumping by kangaroo rats are not well understood. Namely, measures of external joint work do not provide information on the contributions from individual muscles or in-series elastic structures. In this study, we examined the functional roles of a major ankle extensor muscle, the lateral gastrocnemius (LG), and a major knee extensor muscle, the vastus lateralis (VL), through in vivo sonomicrometry and electromyography techniques, during vertical jumping by kangaroo rats. Our data showed that both muscles increased shortening and activity with higher jumps. We found that knee angular velocity and VL muscle shortening velocity were coupled in time. In contrast, the ankle angular velocity and LG muscle shortening velocity were decoupled, and rapid joint extension near the end of the jump produced high power outputs at the ankle joint. Further, the decoupling of muscle and joint kinematics allowed the LG muscle to prolong the period of shortening velocity near optimal velocity, which likely enabled the muscle to sustain maximal power generation. These observations were consistent with an LG tendon that is much more compliant than that of the VL.
英文关键词	Muscle strain Electromyography EMG Muscle function Sonomicrometry Optimal velocity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000738259300004
WOS关键词	ELASTIC ENERGY-STORAGE ; TENDON ; LOCOMOTION ; OUTPUT ; WORK ; ARCHITECTURE ; WALKING
WOS类目	Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375764
作者单位	[Schwaner, M. Janneke; McGowan, Craig P.] Univ Idaho, Dept Biol Sci, Moscow, ID 83844 USA; [Lin, David C.] Washington State Univ, Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA; [Lin, David C.] Washington State Univ, Dept Integrat Physiol & Neurosci, Pullman, WA 99164 USA; [Lin, David C.; McGowan, Craig P.] Washington State Univ, Washington Ctr Muscle Biol, Pullman, WA 99164 USA; [McGowan, Craig P.] WWAMI Med Educ Program, Moscow, ID 83844 USA
推荐引用方式 GB/T 7714	Schwaner, M. Janneke,Lin, David C.,McGowan, Craig P.. Plantar flexor muscles of kangaroo rats (Dipodomys deserti) shorten at a velocity to produce optimal power during jumping[J],2021,224(24).
APA	Schwaner, M. Janneke,Lin, David C.,&McGowan, Craig P..(2021).Plantar flexor muscles of kangaroo rats (Dipodomys deserti) shorten at a velocity to produce optimal power during jumping.JOURNAL OF EXPERIMENTAL BIOLOGY,224(24).
MLA	Schwaner, M. Janneke,et al."Plantar flexor muscles of kangaroo rats (Dipodomys deserti) shorten at a velocity to produce optimal power during jumping".JOURNAL OF EXPERIMENTAL BIOLOGY 224.24(2021).