Newton R A
College of Allied Health Professions, Temple University, Philadelphia, PA 19140, USA.
Brain Inj. 1995 Jul;9(5):445-51. doi: 10.3109/02699059509008204.
Balance characteristics, latency, amplitude, and symmetry were measured in 23 moderate and 23 severe traumatic brain-injured (TBI) patients. Patients received two graded forward and two graded backward linear perturbations. Although within normal limits, latency was high. Patients were able to appropriately grade force in relation to the size of the perturbation. Standing posture prior to and during perturbation was recorded by the amount of force generation through each lower extremity. Some individuals used an asymmetrical balance response following perturbations, whereas others shifted to a more symmetrical weight-bearing balance response. TBI patients may be prone to instability due to a combination of long latency of onset of the balance response coupled with asymmetrical stance patterns during recovery from an unexpected linear perturbation.
对23名中度和23名重度创伤性脑损伤（TBI）患者的平衡特征、潜伏期、振幅和对称性进行了测量。患者接受了两次分级向前和两次分级向后的线性扰动。尽管在正常范围内，但潜伏期较长。患者能够根据扰动的大小适当地分级用力。通过每个下肢产生的力量大小记录扰动前后的站立姿势。一些个体在扰动后使用不对称的平衡反应，而另一些人则转变为更对称的负重平衡反应。由于平衡反应开始的潜伏期较长，再加上从意外线性扰动中恢复期间的不对称姿势模式，TBI患者可能容易出现不稳定。
