فهرست مطالب خانم مائده فرزادی

Hallux Valgus is one of the most foot deformities which increase plantar pressure beneath big toe and first metatarsal. The aim of this study was to assess the effect of foot orthosis on plantar pressure distribution in subjects with mild and moderate Hallux Valgus. Method & Materials: in this quasi-experimental study، females 16 with Hallux Valgus were recruited. Plantar pressure in 8 area of foot was measured by Pedar-X insole when wearing standard shoe only; shoe with foot orthosis and shoe with foot orthosis after a month of using orthosis. Data were analyzed by repeated measure analysis of variance test. using foot orthosis for a month leaded to decrease pressure in the big toe (p<0/019); first metatarsal and 3-5 metatarsals (p<0/001) and also increased pressure in medial mid foot (p<0/001). Foot orthosis decreased peak pressure in fore foot and increased it in medial mid foot. Therefore redistribute plantar pressure to the more normal pattern in Hallux Valgus subjects. So it could be one of the effective methods to prevent the progression of this deformity in its initial steps of formation.

The aim of this study was the comparison of plantar pressure distribution and vertical ground reaction force between dominant and none-dominant limbs in healthy through using Principle Component Analysis (PCA) technique. This study was quasi-experimental in which 20 healthy adult males and females were selected from available subjects. Subject’s plantar pressure distribution and vertical ground reaction force measured using the Pedar-X system. The obtained data were analyzed by Paired-t test، one way analyze of variance، Pearson coefficient correlation and PCA. ANOVA and Paired-t test did not show any significance difference between males and females and dominant and non-dominant limb pressure pattern، (P>0. 05). PCA recognized pressure and force applied on the heel، fingers، big toe and first metatarsal regions for the dominant limb and lateral mid foot، lateral fore foot، first metatarsal and heel regions for non-dominant limb، as important parameters. The results of this study showed that، dominant limb is responsible for propulsion and weight acceptance and non-dominant limb is responsible for balance control. Therefore during biomechanical evaluation of feet، difference between function of dominant and non-dominant limb must be considered.