Hanson J, Lennerstrand G
Acta Ophthalmol (Copenh). 1977 Feb;55(1):88-102. doi: 10.1111/j.1755-3768.1977.tb06098.x.
Mechanical and histochemical properties of inferior oblique muscles(IO) were compared in adult albino rat and pigmented cat. The twitch contraction times and the fusion frequencies were about the same in both species indicating similar contractile properties of the fast contracting fibers. Rat IO seemed to contain fewer slowly contracting fibers than cat IO; half-decay time of the twitch was shorter in rat than in cat muscles and fusion started at higher stimulus frequencies. Fatique resistance was lower in rat than in rat than in cat. Post-tetanic potentiation occurred in the cat but not in the rat IO. Almost all fibers of rat IO were rich in myofibrillar ATPase. In cat IO most fibers showed high myofibrillar ATPase activity, but some fibers in the global layer had moderate to small amounts of this enzyme. This correlates well with the physiological differencies between cat and rat IO.
对成年白化大鼠和有色猫的下斜肌（IO）的力学和组织化学特性进行了比较。两种物种的抽搐收缩时间和融合频率大致相同，表明快速收缩纤维的收缩特性相似。大鼠的下斜肌似乎比猫的下斜肌含有更少的慢收缩纤维；大鼠肌肉抽搐的半衰减时间比猫的短，并且融合在更高的刺激频率下开始。大鼠的疲劳抗性低于猫。强直后增强在猫的下斜肌中出现，但在大鼠的下斜肌中未出现。大鼠下斜肌的几乎所有纤维都富含肌原纤维ATP酶。在猫的下斜肌中，大多数纤维显示出高肌原纤维ATP酶活性，但球层中的一些纤维含有中度至少量的这种酶。这与猫和大鼠下斜肌之间的生理差异密切相关。
