The influence of the gamma system on cross-correlated activity of Ia muscle spindles and its relation to information transmission
The influence of the gamma system on cross-correlated activity of Ia muscle spindles and its relation to information transmission
复制标题
伽玛系统对Ia肌梭互相关活动的影响及其与信息传递的关系
DOI：
10.1016/0304-3940(79)90078-8
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发表时间：
1979
影响因子：
2.5
通讯作者：
P. Rudomín
中科院分区：
文献类型：
--
作者：
G. Inbar;J. Madrid;P. Rudomín
在去大脑猫中，在静态或缓慢变化（<0.3 Hz）的肌肉拉伸，肌梭（MS）对的活动相关性很差，这种相关性没有改变后，腹根切断。与稍快的正弦拉伸（0.3-20赫兹）活动对MS也不相关。然而，切片的前根产生的优惠发射频率在相同的肌梭对，并增加其相关程度。在抑制伽马偏压后检测到的MS活性之间的相关性增加似乎是由微米范围内的外部60 Hz电源线振动引起的。然而，激活伽马系统可以抑制这种相位锁定。当频率高于20 Hz时，伽马系统不能去相关的MS对活动，因为这两个单位成为锁定到他们共同的输入signal.It的建议，由伽马影响MS活动的去相关可能会提高由IA MS合奏通过过滤失真谐波，以及阻尼震颤振荡的牵张反射回路中传输的信息的保真度。
In the decerebrate cat during static or slowly varying (<0.3 Hz) muscle stretches, the activity of muscle spindle (MS) pairs was poorly correlated and such correlation was not changed after ventral root sectioning. With slightly faster sinusoidal stretches (0.3–20 Hz) activity in pairs of MS was also poorly correlated. However, sectioning of the ventral roots produced preferential firing frequencies in the same muscle spindle pairs and increased their degree of correlation. The increase in correlation between MS activity detected after suppressing the gamma bias appeared to arise from extrinsic 60 Hz power line vibration in the range of micrometers. Nevertheless, activation of the gamma system could suppress such phase locking. When frequencies above 20 Hz were used, the gamma system could not decorrelate the MS pair activity since the two units became locked to their common input signal.It is suggested that decorrelation of MS activity by gamma influence may improve the fidelity of the information transmitted by the Ia MS ensemble by filtering distortion harmonics, as well as damping tremor oscillations in the stretch reflex loop.