R.M. Kiss and Z. Knoll (Hungary)
Gait analysis, 3D kinematics, Electromyography, m. adductor longus
Additional studies are necessary to either support or refute the development of an adductor longus avoidance gait. The development of adductor longus avoidance gait pattern has been described as a patient’s tendency to reduce or avoid contraction of the adductor longus muscle during the pre-swing phase. This study used a comprehensive approach, including kinematic and EMG data analysis to determine the electromyographical pattern of m. adductor longus. This study used a comprehensive approach including kinematic and EMG data analysis to determine the electromyographical pattern of m. adductor longus. The study was performed on 105 healthy subjects. Gait analysis was performed using the zebris three dimensional ultrasound-based system with surface electromyography (zebris). Kinematic data (spatial temporal parameters, knee and pelvic joint kinematics) were recorded for the lower limb. The examined muscles include vastus lateralis and medialis, biceps femoris and adductor longus. The EMG traces of m. adductor longus show an adductor longus avoidance gait for a small part of subjects, which does not depend on gender and age. The results suggest that the reduced rotation of the thigh and the pelvis could result in a reduced rise in adductor longus EMG activity during pre-swing. 2. Method The study was carried out with a group of 105 healthy persons. The population consisted of sixty males (mean age 28.17 ± 7.69 years, mean height 178.42 ± 7.20 cm and mean mass 77.89 ± 11.88 kg) and forty-five females ( mean age 25.09 ± 4.21 years, mean height 168.07 ± 5.70 cm and mean mass 59.86 ± 6.38 kg). For inclusion, subjects were not to have any pathology that would affect gait and had to be unfamiliar with treadmill walking. Each subject provided informed consent before participation and signed a consent form approved by the Hungarian Human Subjects Compliance Committee.
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