کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4058763 1265742 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Psychophysiological correlates of the inter-individual variability of head movement control in seated humans
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Psychophysiological correlates of the inter-individual variability of head movement control in seated humans
چکیده انگلیسی

We recently conducted experiments where 24 seated participants were subjected (with eyes closed) to small amplitude, high-jerk impulses of linear acceleration. Responses were distributed as a continuum between two extremes. The “stiff” participants showed little movement of the head relative to the trunk, whereas the “floppy” participants showed a large head rotation in the direction opposite the sled movement. We hypothesized that the stiff behavior resulted from the spontaneous use of an imagined visual frame of reference and undertook this larger-scale study to test that idea. The distribution along the “stiff–floppy” continuum was compared with the scores on psychophysiological tests measuring vividness of imagery, visual field-dependence and motion sickness susceptibility. Multivariate regression analysis revealed that the “stiffness” of individuals was loosely, but significantly related to the vividness of their imagery. However, “stiffness” was not linked to visual field-dependence or motion sickness susceptibility. Even if it explains only 20% of the variance of the data, the increase of “stiffness” with vividness of imagery fits our hypothesis. With eyes closed, stiff people may use imagined external visual cues to stabilize their head and trunk. Floppy people, who are poorer imagers, may rely more on “egocentric”, proprioceptive and vestibular inputs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 23, Issue 3, April 2006, Pages 355–363
نویسندگان
, , , , , , , ,