Reciprocal interactions between the position sense representations of the two forearms
Reciprocal interactions between the position sense representations of the two forearms
复制标题
两个前臂的位置感觉表征之间的交互作用
DOI：
10.1523/jneurosci.03-11-02280.1983
复制
发表时间：
1983
影响因子：
3.4
通讯作者：
A. B. Taublieb
中科院分区：
文献类型：
--
作者：
J. Lackner;A. B. Taublieb
众所周知，肌梭传入会影响对肢体位置的有意识的欣赏。如果肢体肌肉被机械振动，而肢体在由此产生的紧张性振动反射的作用下受到物理限制，肢体将在与振动肌肉拉伸相关的方向上体验到虚幻的运动。提出了两个实验，以探索用另一只手抓住手臂的前臂，其二头肌或三头肌正在振动，如何影响两只手臂的表观位置。如果在振动开始之前抓住了被振动的手臂，那么在振动过程中就会体验到两只手臂的虚幻运动。这种明显的运动和位移的大小小于当振动臂不被握住时所经历的。如果在振动开始后和在经历幻觉位移时抓住振动的手臂，那么它的表观运动被抑制，并且抓握手臂被正确地感知为静止。这种相互作用、位置感相互作用的存在表明，对肢体位置的有意识的感知并不仅仅依赖于孤立的关于单个肢体的传入和传出信息，而是潜在地涉及协调关于整个身体结构的空间信息。
Muscle spindle afferents are known to influence the conscious appreciation of limb position. If a limb muscle is mechanically vibrated while the limb is physically restrained from moving under the action of the resulting tonic vibration reflex, illusory motion of the limb will be experienced in the direction that would be associated with stretch of the vibrated muscle. Two experiments are presented that explore how grasping with the other hand the forearm of an arm whose biceps or triceps muscle is being vibrated affects the apparent position of the two arms. If the vibrated arm is grasped before the onset of vibration, then illusory motion of both arms is experienced during vibration. The magnitude of this apparent motion and displacement is less than that experienced when the vibrated arm is not held. If the vibrated arm is grasped after the onset of vibration and when illusory displacement is being experienced, then its apparent motion is suppressed and the grasping arm is correctly perceived as stationary. The existence of this reciprocal, position sense interaction between the two arms suggests that the conscious awareness of limb position is not dependent solely on afferent and efferent information about individual limbs in isolation, but potentially involves coordinating spatial information about the configuration of the entire body.