Shapiro D M, Crews W D, Harrison D W, Everhart D E
University of Virginia Health Sciences Center Charlottesville 22908, USA.
Int J Neurosci. 1996 Nov;87(3-4):249-56. doi: 10.3109/00207459609070843.
The effects of combinations of bright or dim light and noise levels on hand strength, fatigue, motor perseveration, and tapping rate were evaluated in 13 undergraduate and 13 elderly females. Increments in the intensity of sensory conditions produced opposite effects on grip strength at the left, as opposed to the right hand. Reliable asymmetry in hand strength (right > left) was observed in bright but not dim lighting in the younger group. In the elderly group, the extent of asymmetrical hand strength was related to the combination of light and noise intensity. Data suggest that increments in sensory conditions may differentially activate the cerebral hemispheres of the elderly and younger groups affecting grip strength. Results are discussed in relation to the hemiaging hypothesis.
在13名本科女性和13名老年女性中，评估了明亮或昏暗光线与噪音水平的组合对手部力量、疲劳、运动持续性和敲击速率的影响。感觉条件强度的增加对左手握力产生了相反的影响，与右手情况相反。在年轻组中，明亮而非昏暗的光照条件下观察到了可靠的手部力量不对称（右手>左手）。在老年组中，手部力量不对称的程度与光线和噪音强度的组合有关。数据表明，感觉条件的增加可能会以不同方式激活老年组和年轻组的大脑半球，从而影响握力。结合半脑老化假说对结果进行了讨论。
