Talis V L, Kapitonov M A, Maksimova E V
Zh Vyssh Nerv Deiat Im I P Pavlova. 2011 Jul-Aug;61(4):413-22.
We compared the upright standing in 7 patients with sensory-motor disorders and 7 healthy subjects (control) before and after 30-s involuntary neck muscle contraction. A trajectory of the center of pressure was recorded during 30-s standing with the eyes open, eyes closed and standing on a foam-rubber with the eyes open. As compared to healthy subjects, patients exhibited an increased body sway area during standing with the eyes open on both the firm surface and foam-rubber and a backward shift of the center of pressure during standing with the eyes both open and closed. Closing the eyes affected the upright standing of patients to a lesser extent than standing of healthy subjects. Involuntary neck muscle contraction within 30 s elicited a backward shift of the center of pressure in healthy subjects, especially during standing with the eyes closed, and a decrease in the length of the center-of-pressure trajectory, especially of its frontal component during standing on the foam-rubber. In patients, a post-effect of the neck muscle contraction manifested itself as a decrease in the body sway area during standing on the foam-rubber and relative increase in the frontal component of the center-of-pressure trajectory during standing with the eyes closed. The results suggest that the upright standing of patients with sensory-motor disorders is more sensitive to somatosensory than visual input, and 30-s neck muscle contraction approach their postural stability to the age-matched control.
我们比较了7名感觉运动障碍患者和7名健康受试者（对照组）在30秒非自主性颈部肌肉收缩前后的直立站姿。在睁眼、闭眼以及睁眼站在泡沫橡胶上的30秒站立过程中记录压力中心轨迹。与健康受试者相比，患者在睁眼站在坚实表面和泡沫橡胶上时身体摆动面积增加，在睁眼和闭眼站立时压力中心向后移动。闭眼对患者直立站姿的影响程度小于对健康受试者站立的影响。30秒内的非自主性颈部肌肉收缩使健康受试者的压力中心向后移动，尤其是在闭眼站立时，并且压力中心轨迹长度缩短，尤其是在站在泡沫橡胶上时其额部分量缩短。在患者中，颈部肌肉收缩的后效应表现为站在泡沫橡胶上时身体摆动面积减小，以及闭眼站立时压力中心轨迹额部分量相对增加。结果表明，感觉运动障碍患者的直立站姿对躯体感觉输入比对视觉输入更敏感，并且30秒颈部肌肉收缩使他们的姿势稳定性接近年龄匹配的对照组。
