SKELETAL MATURITY AT ONSET OF THE ADOLESCENT GROWTH SPURT AND AT PEAK VELOCITY FOR GROWTH IN HEIGHT - A THRESHOLD EFFECT
SKELETAL MATURITY AT ONSET OF THE ADOLESCENT GROWTH SPURT AND AT PEAK VELOCITY FOR GROWTH IN HEIGHT - A THRESHOLD EFFECT
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DOI：
10.1080/03014469100001372
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发表时间：
1991-01-01
影响因子：
1.7
通讯作者：
KONIAREK, J
中科院分区：
文献类型：
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作者：
HAUSPIE, R;BIELICKI, T;KONIAREK, J
在191波兰男孩的弗罗茨瓦夫生长研究，骨龄和实足年龄之间的关系进行了检查，在青春期生长突增（起飞）和高峰期的身高增长速度（PHV）。 结果发现，在PHV，骨龄是显着较少的变量比实足年龄，但在起飞没有这样的减少变异是可见的。 对这一发现提出以下解释。 最终，突增的开始取决于下丘脑中正在进行的某些成熟过程，并且与当时长骨的进展几乎没有关系。 因此，在正常观察到的个体实际年龄范围内，骨骼发育可以在任何骨骼成熟水平开始。 另一方面，当骨骼成熟度足够高时，睾酮就会将其对骨骼的影响从刺激软骨生长转变为刺激骨骺融合，从而达到峰值身高速度。 因此，PHV必然发生在骨骼成熟度的范围内，比起飞可能发生的范围更受限制。
In 191 Polish boys of the Wroclaw Growth Study, the relationship between skeletal age and chronological age was examined at the onset of the adolescent growth spurt (take-off) and at peak velocity of height growth (PHV). It was found that, at PHV, skeletal age is markedly less variable than is chronological age, but at take-off no such reduction in variability is visible. The following interpretation of this finding is proposed. The onset of the spurt depends, ultimately, upon some maturational processes going on in the hypothalamus and shows little relationship with the advancement of the long bones at that time. Therefore, the spurt can begin at any level of skeletal maturity within the range normally observed at the chronological age at which it happens to begin in the individual. Peak height velocity, on the other hand, is reached when skeletal maturity is sufficiently advanced for testosterone to change its influence upon the bones from one which consists in stimulating cartilage growth to one which consists in stimulating epiphyseal fusion. Therefore, PHV is bound to occur within a range of skeletal maturity much more restricted than that within which take-off can occur.