Cerebral dominance and spinal excitability in cognition of motor space

运动空间认知中的大脑优势和脊髓兴奋性

• 批准号: 06680112
• 负责人: IMANAKA Kuniyasu
• 金额: $ 1.34万
• 依托单位: Tokyo Metropolitan University (1995)Nagasaki University (1994)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680112/
• 关键词: Cognition of Motor Space; Cerebral Dominance; Spinal MN Excitability; Attention; CNV; H-Reflex

We previously demonstrated that arm and finger positioning was undershot when the head was rotated in the same direction as the positioning movement and overshot when the head was rotated in the direction opposite to positioning movement. Such biasing effects were assumed to arise etiher from some reflex effects due to head rotation or cognitive distortion in spatial pereception and control of arm and finger positioning. We examined in this research project two likely sources of the response biasing effects in arm and finger positioning with 90ﾟ head rotation. (1) A reaction-time experiment with a CNV paradigm was conducted to test the effects of cerebral dominance for directing attention towards reaction time stimuli that were given within the contralateral hemispace. Result showed only small amplitudes in CNVs at both C3 and C4, with the absence of laterality effects. This indicates the subjects may not have directed their attention to contralateral hemispace in the simple reaction time task used in this experiment. We will further examine in the future project the aspext of subjects' attention, using a choice reaction time task to manipulate subiject's attention toward contralateral hemispace. (2) The soleus H-reflex was examined throgh the period of 14 seconds after completion of head rotation. The amplitude of soleus H-reflex increased up to about 150% of controlH-reflex (at rest) just after the completion of head rotation. This then gradually returned to control level with in 6 or 7 sec. The head rotation could therefore affect spinal motoneuronal excitability no longer than about 6 or 7 sec after head rotation. This implies that the spinal reflex effect due to head rotation is ruled out as a sourceof the response biasing effect appearing in arm and finger positioning with 90ﾟ head-rotation.

我们以前演示过，当头部以与定位运动相同的方向旋转时，手臂和手指的定位是下倾，而当头部以与定位运动相反的方向旋转时，手臂和手指的定位是上冲。这种偏向效应被认为是由头部旋转或空间感知和手臂和手指位置控制中的认知扭曲引起的一些反射效应引起的。在本研究项目中，我们研究了头部旋转90ﾟ时手臂和手指定位时反应偏向效应的两个可能来源。(1)采用CNV范式进行反应时实验，以检验大脑优势对对侧大脑半球给出的反应时刺激的影响。结果显示，C3、C4的CNV波幅较小，无偏侧效应。这表明，在本实验中使用的简单反应时任务中，受试者可能没有将他们的注意力集中到对侧的半脑空间。在未来的项目中，我们将进一步考察受试者的注意力，使用选择反应时任务来操纵受试者对对侧半空间的注意力。(2)在旋转完成后14秒内检查比目鱼肌H反射。在头部旋转完成后，比目鱼肌H反射的幅度增加到对照H反射的150%左右(静止时)。然后在6秒或7秒内逐渐恢复到控制水平。因此，头部旋转对脊髓运动神经元兴奋性的影响不会长于头部旋转后约6或7秒。这意味着，头部旋转引起的脊髓反射效应被排除为手臂和手指旋转90ﾟ时出现反应偏向效应的来源。

项目成果

Funase,K.,Imanaka,K.,& Nishihira,Y.: "Inhibition of the soleus H-reflex during dorsiflexion is dependent on individual difference in maximal soleus H-reflex as a test reflex" Perceptual and Motor Skills. 82. 403-410 (1996)

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Nishihira,Y.,Araki,H.,Funase,K.,Imanaka,K.: "Somatosensory evoked potentials following voluntary movement during upper arm compression" Electromyography and Clinical Neurophysiology. 36. 21-28 (1996)

Nishihira，Y.，Araki，H.，Funase，K.，Imanaka，K.：“上臂压缩期间随意运动后的体感诱发电位”肌电图和临床神经生理学。

Nishihira Y,Araki H,Funase K,Imanaka K,Suzuki J,& Takemiya T: "Somatosensory evoked potentials following voluntary movement during upper arm compression" Electromyography and Clinical Neurophysiology. 36. 21-28 (1996)

西平 Y、荒木 H、船濑 K、今中 K、铃木 J、

Funase K,Imanaka K,Nishihira Y,Higashi T,Yoshimura T,& Araki H: "Motoneuron pool excitability in the resting state affects the amount of reciprocal inhibition" (Submitted for publication).

船濑 K、今中 K、西平 Y、东 T、吉村 T、

Imanaka,K.,Yamauchi,M. Funase K.& Nishihira,Y.: "Information-processing mediating the location-distance interference in motor short-term memory" Annals of Physiological Anthropology. 12. 269-283 (1993)

今中，K.，山内，M.