The force‐velocity relation of rat fast‐ and slow‐twitch muscles examined at different temperatures.
The force‐velocity relation of rat fast‐ and slow‐twitch muscles examined at different temperatures.
复制标题
在不同温度下检查大鼠快肌和慢肌的力-速度关系。
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Ranatunga
中科院分区：
文献类型：
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作者：
K. Ranatunga
在35至10摄氏度的温度下，在大鼠快速收缩（趾长伸肌，e.d.l.）中检查稳态力-速度关系。和慢收缩（比目鱼肌）肌肉制备物，直接刺激，并采用等渗释放技术。力-速度关系的曲率随着两块肌肉的冷却而增加;在25 ℃以下增加更明显。电火花线切割的最大缩短速度。从35 ℃冷却到25 ℃时，肌肉的Q10（温度系数）下降为1.8;在冷却到20 ℃以下时，肌肉的Q10下降为2.4。慢肌的缩短速度对温度更敏感。比目鱼肌的Q10值在35 - 25 ℃时为2.0，在20 ℃以下为3.5。等长强直张力上升的最大速率具有与每种肌肉类型的最大缩短速率相似的温度敏感性。
The steady‐state force‐velocity relation was examined at temperatures between 35 and 10 degrees C in rat fast‐twitch (extensor digitorum longus, e.d.l.) and slow‐twitch (soleus) muscle preparations in vitro, with direct stimulation, and employing the isotonic release technique. The curvature of the force‐velocity relation increased with cooling in both muscles; the increase was more pronounced below 25 degrees C. The maximum shortening velocity of e.d.l. muscle decreased with a Q10 (temperature coefficient) of 1.8 in cooling from 35 to 25 degrees C; it decreased with a Q10 of 2.4 in cooling below 20 degrees C. The shortening velocity of slow muscle was more temperature sensitive. The Q10 values for soleus muscle were 2.0 at 35‐25 degrees C and 3.5 below 20 degrees C. The maximum rate of isometric tetanic tension rise had a temperature sensitivity similar to the maximum velocity of shortening in each muscle type.