اثرات تخريب حس عمقي و بينايي بر اجراي الگوهاي درون مرحله و خارج مرحله دست

هدف از تحقيق حاضر بررسي دستكاري حواس و سرعت بر اجراي هماهنگي پوياي دو دستي بود. بنابراين، 15 دانشجوي تربيت بدني دانشگاه شهيد بهشتي با دامنه سني 18 تا 25 سال، به عنوان آزمودني الگوهاي هماهنگي درون مرحله و خارج مرحله را از سرعت آهسته به تند در 4 وضعيت حسي مختلف اجرا كردند. براي بررسي دو الگوي حركتي، از دو آزمون تحليل واريانس با اندازه گيري تكراري (4 شرايط حسي times 3 سرعت اجرا) روي هر كدام از الگوهاي درون مرحله و خارج مرحله استفاده و اثرات اصلي پس از آن با استفاده از آزمون تعقيبي بونفرني تحليل شد. متغير وابسته خطاي فاز نسبي بود. نتايج نشان داد كه افزايش سرعت اجراي حركات بر اجراي الگوي حركتي خارج مرحله1800 اثر داشت(001/0p=)، اما بر الگوي درون مرحله00 اثري نداشت(9/0p=). نتايج دستكاري حواس نشان داد كه در دقت و تغيير پذيري اجراي دو فاز نسبي الگوهاي حركتي، دستكاري بينايي و حس عمقي اثر دارد(001/0. علاوه براين، در اين تحقيق بيشترين مقدار ميانگين خطاي فازنسبي و انحراف معيار خطاي فاز نسبي در وضعيت دستكاري حس عمقي بود(001/0p=). در توضيح يافته هاي حاضر مي توان بيان كرد كه تكليف خطي هماهنگي دو دستي در تحقيق حاضر يك تكليف وابسته به حس عمقي است.

Purpose: Knee osteoarthritis (OA) is believed to be an important risk factor for falling. Total knee replacement (TKR) is a commonly used choice when other methods are not satisfactory. Proprioception impairment, risk of falling and balance disorder are within the main complications of this method. While multiple protocols have been suggested for TKR, efficacy of early isotonic exercise therapy aimed at improving body balance after TKR has not been thoroughly investigated. Methods: In this quasiexperimental study, ten female patients with severe OA, sled by nonrandomized convenient method were randomly assigned into either ldquo routinerdquo or ldquo early isotonic exerciserdquo groups. The subjects were undergone TKR surgery. The rehabilitation process (being the same for both groups until the second week) was initiated the day after surgery and lasted for 6 weeks. From the second week, the experimental group received progressive, isotonic exercises, in addition to the routine rehabilitation protocol. Static balance was assessed prior to surgery and after the rehabilitation process in both groups by Sharpened Romberg tests. Results: In both groups, static balance was significantly enhanced after surgery and rehabilitation (P<0.000). Prior to surgery the groups were indifferent according to their static balance scores (P=0.423) but, after surgery and rehabilitation, the patients receiving early isotonic exercise in addition to routine physical therapy, were significantly in better balance condition comparing the control group (P=0.000). Conclusion: Routine physical therapy with and without early isotonic exercise therapy enhances static balance but, the balance improvement was more pronounced with this type of exercise. Early administration of isotonic exercise therapy in addition to the routine physical therapy program may enhance balance and prevent fall in patients with TKR.