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PubMed2005

Gene-environment processes in task persistence.

Task persistence is a construct that appears to have broad influence on child competence generally, from self regulation in carrying out tasks, to cognitive performance. In a recent developmental study of task persistence, Deater-Deckard and colleagues report that heritability of task persistence increased over time, whereas the contribution from the shared environment decreased during the transition from early to middle childhood. Two explanations for the developmental shift are discussed here: a choice hypothesis and a schooling hypothesis. An important next step lies in documenting gene-environment processes directly via hybrid research models, combining work in molecular biology with longitudinal observations of behavior.

Attention↗

PubMed2005

Primary hip arthroplasty through a limited posterior trochanteric osteotomy.

This study evaluates primary hip replacement performed using a modified posterior approach through a limited posterior trochanteric osteotomy bone block that includes the insertions of the posterior capsule and short external rotators--as this may enhance secure reattachment of the posterior soft-tissue envelope and protect against postoperative instability. Sixty-eight consecutive primary hip replacements performed through a posterior trochanteric osteotomy were prospectively followed. Two were lost to follow-up before a minimum of 2 years after the arthroplasty; the remaining 66 hips were followed for a mean of 10 years (range: 2 to 15). The median Harris hip score improved from 43 to 84 points (p < 0.0001). Radiographic union of the osteotomy was confirmed in 64 hips (94%). Two episodes of early dislocation occurred 5 days and 8 months postoperatively; both were successfully managed nonoperatively without continuing instability. There were no cases of late instability. Posterior approach to the hip joint through a posterior trochanteric osteotomy is associated with high union rates and a low rate of late instability after hip replacement.

Adult↗

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"He said, she said, NSAIDs".

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Anti-Inflammatory Agents, Non-Steroidal↗