Division of labor in human extraocular muscle.
Division of labor in human extraocular muscle.
复制标题
人类眼外肌的分工。
DOI：
10.1001/archopht.1973.01000050321017
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发表时间：
1973
影响因子：
--
通讯作者：
C. Collins
中科院分区：
文献类型：
--
作者：
A. B. Scott;C. Collins
在注视、跟随、聚散和扫视运动期间，以及在眨眼和侧向头部倾斜期间，从人眼外肌和提上睑肌进行肌电图（EMG）记录。运动单位改变活动与一种类型的运动也这样做与其他类型的眼球运动或在固定在另一个凝视位置。从眼眶层的肌肉（远离地球仪）的记录显示活动的肌肉招募早期，而运动单位记录从层附近的地球仪成为活跃的招募模式。这些发现支持了这样一种观点，即各种组织学肌纤维类型在功能上是根据它们所做的工作量而区分的，而不是根据它们所贡献的眼球运动类型。
Electromyographic (EMG) recordings from human extraocular and levator muscles were made during fixation, following, vergence, and saccadic movements, and during blinks and lateral head tilting. Motor units that altered activity with one type of movement also did so with eye movements of other types or during fixation at another gaze position. Recordings made from the orbital layers of the muscle (away from the globe) showed activity earlier in recruitment of the muscle, while motor units recorded from layers near the globe became active later in the recruitment pattern. These findings support the notion that various histologic muscle fiber types are functionally differentiated on the basis of the amount of work that they do, rather than on the basis of the type of eye movement to which they contribute.