Ceyte Hadrien, Cian Corinne, Nougier Vincent, Olivier Isabelle, Roux Alain
Centre de Recherches du Service de Santé des Armées, BP 87, 38702, La Tronche cedex, France.
Exp Brain Res. 2006 Mar;170(1):136-40. doi: 10.1007/s00221-006-0389-7. Epub 2006 Feb 25.
The present study focused on the influence of neck vibration on the perception of the head and trunk midline position (orientation and localization). The orientation of the head and trunk was investigated by the rolling adjustment of a rod on their midline while their localization was investigated by the adjustment of the position of a visual dot as being straight-ahead the eyes or the sternum. The first experiment investigated whether a head-trunk dissociation was induced by the unilateral vibration of neck muscles in upright and restrained subjects. Results showed that the subjective orientation and localization of whole-body midline were shifted toward the vibrated side. The second experiment determined the effect of the neck muscles vibration when the subjects were lying on their side. The effect of vibration disappeared when the side of vibration was opposed to the side of postural inclination and it was stronger than in the upright position when the side of vibration and the side of postural inclination were congruent. Whereas, results suggested that the input from neck muscle proprioceptors participates directly to the elaboration of the egocentric space, the question may be raised as to how the sensory cues interacted in their contribution to the neural generation of an egocentric, body centred coordinate system.
本研究聚焦于颈部振动对头部和躯干中线位置感知（方向和定位）的影响。通过在头部和躯干中线上滚动一根杆来研究其方向，同时通过调整视觉点的位置使其位于眼睛或胸骨正前方来研究其定位。第一个实验研究了在直立且受约束的受试者中，颈部肌肉的单侧振动是否会引发头-躯干分离。结果表明，全身中线的主观方向和定位向振动侧偏移。第二个实验确定了受试者侧卧时颈部肌肉振动的效果。当振动侧与姿势倾斜侧相反时，振动效果消失；当振动侧与姿势倾斜侧一致时，振动效果比直立姿势时更强。然而，结果表明颈部肌肉本体感受器的输入直接参与了自我中心空间的构建，关于感觉线索如何相互作用以促进以身体为中心的自我中心坐标系的神经生成，可能会引发疑问。
