期刊
JOURNAL OF NEUROPHYSIOLOGY
卷 101, 期 1, 页码 8-19出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/jn.90934.2008
关键词
-
资金
- National Institute of Neurological Disorders and Stroke [R01 NS-049884, R01 NS-39340, R01 NS-058659]
- Swedish Research Council [11554]
- Gosta Fraenckels Foundation
- Erik and Edith Fernstrorms Foundation
- Barrow Neurological Foundation
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS039340, R01NS049884, R01NS058659] Funding Source: NIH RePORTER
Karayannidou A, Zelenin PV, Orlovsky GN, Sirota MG, Beloozerova IN, Deliagina TG. Maintenance of lateral stability during standing and walking in the cat. J Neurophysiol 101: 8-19, 2009. First published November 12, 2008; doi:10.1152/jn.90934.2008. During free behaviors animals often experience lateral forces, such as collisions with obstacles or interactions with other animals. We studied postural reactions to lateral pulses of force (pushes) in the cat during standing and walking. During standing, a push applied to the hip region caused a lateral deviation of the caudal trunk, followed by a return to the initial position. The corrective hindlimb electromyographic (EMG) pattern included an initial wave of excitation in most extensors of the hindlimb contralateral to push and inhibition of those in the ipsilateral limb. In cats walking on a treadmill with only hindlimbs, application of force also caused lateral deviation of the caudal trunk, with subsequent return to the initial position. The type of corrective movement depended on the pulse timing relative to the step cycle. If the force was applied at the end of the stance phase of one of the limbs or during its swing phase, a lateral component appeared in the swing trajectory of this limb. The corrective step was directed either inward (when the corrective limb was ipsilateral to force application) or outward (when it was contralateral). The EMG pattern in the corrective limb was characterized by considerable modification of the hip abductor and adductor activity in the perturbed step. Thus the basic mechanisms for balance control in these two forms of behavior are different. They perform a redistribution of muscle activity between symmetrical limbs (in standing) and a reconfiguration of the base of support during a corrective lateral step (in walking).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据