نوع مقاله : مقاله پژوهشی
نویسندگان
گروه بیومکانیک ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Aims This study aims to assess the kinetic parameters and muscle activation involved in the anticipatory postural adjustment (APA) phase of gait initiation in individuals with and without chronic ankle instability (CAI).
Methods Twenty participants, evenly divided into 2 groups of 10, voluntarily took part in this study. They were asked to initiate gait after the auditory cue while standing on the force plate. The muscle activity of the tibialis anterior (TA), soleus (SL), biceps femoris (BF), rectus femoris (RF), peroneus longus (PL), gluteus medius (Gmed), and gluteus maximus (Gmax) in both (left and right) legs, along with force parameters (in 3 directions) and center of pressure (in 2 directions) were measured for the 2 groups. The dependent variables were analyzed by using the independent t tests.
Results The findings revealed significant differences in the kinetic parameters and the activations of the TA_r (P=0.04), BF_L (P=0.04), and SL_L (P=0.03) muscles between the 2 groups. No statistically significant differences were observed in the other muscles (P>0.05). The outcomes suggest that during the APA phase, individuals with CAI exhibit decreased muscle activities in TA_r and SL_r, and increased muscle activities in BF_L muscle compared to the control group. These changes, which aim to maintain body stability, may reflect alterations in neural transmission patterns originating from the central nervous system (CNS).
Conclusion Since the APA phase is regulated by the secondary motor area, alterations in motor control observed in those with CAI could be attributed to changes in supraspinal. Neuromuscular training for muscles which influence motor control strategies affected by CAI may be a beneficial way of the rehabilitation program for these individuals.
کلیدواژهها [English]
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