Caria Marcello A, Tavera Claudio, Melis Francesco, Mameli Ombretta
Department of Biomedical Sciences, Human Physiology Division, Faculty of Medicine, Sassari University, Sassari, Italy.
Acta Otolaryngol. 2003 Sep;123(7):817-25. doi: 10.1080/00016480310002483.
To elucidate the electromyographic (EMG) patterns elicited in the superficial paraspinal muscles (sacrospinalis, ileocostalis lomborum, longissimus dorsi and splenium cervicis).
In normal subjects adapted to the dark and standing on a force platform, EMG patterns were elicited in the superficial paraspinal muscles by means of unilateral cold caloric stimulation of the labyrinth.
Almost concomitantly with the occurrence of postural derangement of the subject's trunk and head, the EMG patterns of the paraspinal muscles on both sides showed significant and consistent changes. In particular, the paraspinal muscles ipsilateral to the stimulated side showed a significant reduction in activity, while the homologous muscles of the contralateral side markedly increased their activity, with a consistent delay in comparison to the contralateral muscles. Moreover, the EMG changes occurred in a hierarchic fashion in the caudal-rostral direction. In fact, the more powerful and longer-lasting effects were consistently observed in the more caudal muscles, i.e. the sacrospinalis and ileocostalis, while the effects on the longissimus dorsi and splenium cervicis muscles were weak and inconsistent.
These results suggest a possible use for the EMG patterns resulting from unilateral cold caloric stimulation for clinical evaluation of the vestibulospinal reflex.
阐明在浅表椎旁肌（骶棘肌、腰髂肋肌、背最长肌和颈夹肌）中引发的肌电图（EMG）模式。
在适应黑暗并站立在测力平台上的正常受试者中，通过对迷路进行单侧冷热水刺激，在浅表椎旁肌中引发EMG模式。
几乎与受试者躯干和头部姿势紊乱的出现同时，两侧椎旁肌的EMG模式显示出显著且一致的变化。特别是，受刺激侧同侧的椎旁肌活动显著减少，而对侧的同源肌肉活动明显增加，与对侧肌肉相比有一致的延迟。此外，EMG变化在尾端-头端方向呈层级式发生。事实上，在更尾端的肌肉，即骶棘肌和腰髂肋肌中，始终观察到更强烈、更持久的影响，而对背最长肌和颈夹肌的影响则微弱且不一致。
这些结果表明，单侧冷热水刺激产生的EMG模式可能用于前庭脊髓反射的临床评估。
