Whiteley R J, Adams R D, Nicholson L L, Ginn K A
University of Sydney, NSW, Australia.
Phys Ther Sport. 2008 Nov;9(4):177-84. doi: 10.1016/j.ptsp.2008.07.002. Epub 2008 Sep 10.
To determine the relationship between the amount of humeral torsion and a measure of active proprioception in adolescent male throwing athletes.
Cross-sectional laboratory study with uninjured subjects.
University of Sydney and NSW Institute of Sport.
Participants were 16 adolescent male baseball players (15.0-18.1 years old, SD=16.3) holding baseball scholarships at the NSW Institute of Sport.
The main outcome measures, active proprioception (shoulder rotation, in 90 degrees of arm abduction moving towards external rotation, using the Active Movement Extent Discriminating Apparatus) and humeral torsion (using an ultrasound-assisted method), were measured bilaterally.
A strong (r=0.88) and significant (p=0.001) correlation was found between increasing humeral retrotorsion and better active proprioceptive acuity in the non-dominant arm, while the relation was weaker (r=0.41) and did not reach statistical significance (p=0.120) for the dominant arm.
A cognitive processing capacity model, which suggests that greater humeral retrotorsion reduces neural processing requirements, has been proposed to explain the direct relationship between proprioceptive acuity and humeral retrotorsion.
确定青少年男性投掷运动员肱骨扭转量与主动本体感觉测量值之间的关系。
对未受伤受试者进行的横断面实验室研究。
悉尼大学和新南威尔士州体育学院。
参与者为16名在新南威尔士州体育学院获得棒球奖学金的青少年男性棒球运动员（年龄15.0 - 18.1岁，标准差 = 16.3）。
双侧测量主要观察指标，即主动本体感觉（使用主动运动范围辨别仪，在手臂外展90度并向外侧旋转时测量肩部旋转）和肱骨扭转（使用超声辅助方法）。
在非优势手臂中，发现肱骨后扭转增加与更好的主动本体感觉敏锐度之间存在强相关性（r = 0.88）且具有显著性（p = 0.001），而在优势手臂中，这种关系较弱（r = 0.41）且未达到统计学显著性（p = 0.120）。
已提出一种认知加工能力模型来解释本体感觉敏锐度与肱骨后扭转之间的直接关系，该模型认为更大的肱骨后扭转可降低神经加工需求。
