کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4034101 1263427 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Changes in vergence dynamics due to repetition
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
Changes in vergence dynamics due to repetition
چکیده انگلیسی

Vergence insufficiency is frequent in many populations including children with vertigo in the absence of measurable vestibular dysfunction. Orthoptic exercises are typically used to improve vergence and the clinical practice suggests that simple repetition of vergence movements improves it. Objective eye movement recordings were used to asses the dynamics and spatial–temporal properties of convergence (8.7°) and divergence (2.7°) along the midline while these movements were repeated 80 times. Eight children, aged on average 13 years and showing vertigo symptoms accompanied with vergence insufficiency, participated. For both, convergence and divergence the velocity increased and the overall duration decreased; the amplitude of the mean transient component of the response changed significantly. These findings are compatible with models of double mode control of vergence eye movements (transient – open-loop vs. sustained – closed loop). Due to simple repetitions a real improvement in the dynamics of vergence along the midline occurred.


► Clinical practice suggests that simple repetition improves vergence insufficiency.
► Eye movement recordings were used to asses the dynamics of vergence.
► For convergence and divergence the velocity in- and the overall duration de-creased.
► The amplitude of the mean transient component of vergence changed significantly.
► Repetition as clinical means affected successfully structures controlling vergence.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 51, Issue 16, 15 August 2011, Pages 1845–1852
نویسندگان
, , , ,