کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10463428 | 925148 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Decline in motor prediction in elderly subjects: Right versus left arm differences in mentally simulated motor actions
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
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چکیده انگلیسی
This study investigates the effects of age upon the temporal features of executed and imagined movements performed with the dominant (D; right) and nondominant (ND; left) arms. Thirty right-handed subjects were divided into two groups: (i) the young group (n = 15; mean age: 22.5 ± 2.5 years) and (ii) the elderly group (n = 15; mean age: 70.2 ± 2.2 years). The motor task, involving arm pointing movements among four pairs of targets (.5 cm, 1 cm, 1.5 cm and 2 cm), imposed strong spatiotemporal constraints. During overt performance, young and elderly subjects modulated movement duration according to the size of targets, despite the fact that movement speed decreased with age as well as in the left arm compared with the right. This observation was also valid for the covert performance produced by the young group. However, such a strong relationship between covert movement durations and target size was not as obvious in the elderly group. Young, compared to elderly subjects, showed stronger correlations and smaller absolute differences between executed and imagined movements for both arms. Additionally, the absolute difference between executed and imagined arm movement durations was more pronounced for the left than the right arm in aged subjects. This result suggests a selective decline with age of mental prediction of motor actions, which is more prominent when the ND arm is involved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cortex - Volume 44, Issue 9, October 2008, Pages 1271-1278
Journal: Cortex - Volume 44, Issue 9, October 2008, Pages 1271-1278
نویسندگان
Xanthi Skoura, Pascaline Personnier, Annie Vinter, Thierry Pozzo, Charalambos Papaxanthis,