Gearing effects of the patella (knee extensor muscle sesamoid) of the helmeted guineafowl during terrestrial locomotion.
Gearing effects of the patella (knee extensor muscle sesamoid) of the helmeted guineafowl during terrestrial locomotion.
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DOI：
10.1111/jzo.12485
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发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
Hutchinson JR
中科院分区：
文献类型：
--
作者：
Allen VR;Kambic RE;Gatesy SM;Hutchinson JR
Human patellae (kneecaps) are thought to act as gears, altering the mechanical advantage of knee extensor muscles during running. Similar sesamoids have evolved in the knee extensor tendon independently in birds, but it is unknown if these also affect the mechanical advantage of knee extensors. Here, we examine the mechanics of the patellofemoral joint in the helmeted guineafowl Numida meleagris using a method based on muscle and tendon moment arms taken about the patella's rotation centre around the distal femur. Moment arms were estimated from a computer model representing hindlimb anatomy, using hip, knee and patellar kinematics acquired via marker‐based biplanar fluoroscopy from a subject running at 1.6 ms−1 on a treadmill. Our results support the inference that the patella of Numida does alter knee extensor leverage during running, but with a mechanical advantage generally greater than that seen in humans, implying relatively greater extension force but relatively lesser extension velocity.
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影响因子：
2.4
作者：
Johnson, Will L.;Jindrich, Devin L.;Edgerton, V. Reggie
通讯作者：
Edgerton, V. Reggie
影响因子：
2.4
作者：
Charles JP;Cappellari O;Spence AJ;Wells DJ;Hutchinson JR
通讯作者：
Hutchinson JR
影响因子：
2.8
作者：
O'Neill, Matthew C.;Lee, Leng-Feng;Umberger, Brian R.
通讯作者：
Umberger, Brian R.
影响因子：
2.4
作者：
Regnault, Sophie;Jones, Marc E. H.;Hutchinson, John R.
通讯作者：
Hutchinson, John R.
影响因子：
56.9
作者：
BIEWENER, AA
通讯作者：
BIEWENER, AA