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Bilateral Asymmetries of Lower Limb's Muscle Activity during Basic Movement of Cha-Cha-Cha dance
Vondrášek, David ; Sládek, Vladimír (advisor) ; Bigoni, Lucie (referee)
1 Abstract The purpose of this study was to describe the degree of bilateral asymmetry of lower limbs' muscle activity in the dance movement Cha-cha-cha and to determine the cause of bilateral asymmetries of lower limbs' muscle activity. Differences in muscle activity of contralateral lower limbs might be caused by the factor of bilaterally asymmetrical movement patterns, the factor of neural pathways or the factor of training. We hypotetize that comparing the direction of bilateral asymmetry in muscle activity between asymmetrical dance movement and its mirror alternative can determine the cause of bilateral asymmetry in muscle activity of lower limbs within the movement. We studied 14 volunteers (7 men, 7 women), all were actively dancing at competitive level. We tested the muscle activity of musculus vastus lateralis (VL), musculus biceps femoris (BF), musculus tibialis anterior (TA) a musculus gastrocnemius lateralis (GL) using surface electromyography. The dance movement Cha-cha-cha was bilaterally asymmetrical in the muscle activity of VL, TA and GL. Direction of lower limbs' muscle activity indicates, that TA, being a muscle responsible for foot movement, might be affected by the factor of neural pathways and brain laterality, while VL and GL might be more affected by the factor of training. Key...
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Changes of the facial skeleton in Central Europe during the last 1200 years
Bejdová, Šárka ; Velemínský, Petr (advisor) ; Bigoni, Lucie (referee) ; Galeta, Patrik (referee)
The objective of the Dissertation was to describe, quantify and interpret to which degree the shape and size of the facial skeleton of people living in the territory of today's Czech Republic in the period from the Early Middle Ages to the present day, i.e. in the course of the approx. last 1200 years, have changed. In this time period, morphological differences between populations, changes in the sexual dimorphism, modularity and allometry of the facial skeleton were examined. The evaluation was based on CT-images of skulls from three historical populations, specifically from the Early Middle Ages, High Middle Ages and the early modern period. The current population was represented by CT-images of living people. We studied the facial skeletons of a total of 329 individuals, of which 183 were men and 146 women. The CT- images were used as a base for the creation of virtual 3D surface models. The facial skeleton was divided into three morphological units, which were further examined. These were the skeleton of the upper face, lower jaw and palate. The statistical processing was carried out applying methods of geometric morphometrics allowing the separate studying of the shape and size variability of the examined units. When comparing the size and shape differences between studied populations it is...
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Phenotype variability of the skeleton: asymmetry, sexual dimorphism and their changes in time
Bigoni, Lucie ; Velemínská, Jana (advisor) ; Sosna, Daniel (referee) ; Beňuš, Radoslav (referee)
This doctoral thesis is submitted in the form of science publications and conference presentations together with theoretical introduction. It presents several points of view on the variability evaluation in the skull (and postcranial skeleton), with accent on diachronic changes monitoring, asymmetry and sexual dimorphism. This study concentrates on analysis (using traditional and geometric morphometrics) of size and shape of the skull, limb bones and face in the samples originated in the region of the Czech Republic (Central Europe). The first one is a photographical documentation of the Upper Palaeolithic skulls from Předmostí near Přerov (age 25,000 - 27,000 years). The second material is represented by skulls and limb bones deriving from the Early Mediaeval settlement in Mikulčice (The Great Moravia, 9th - 10th century). The third sample originated in the 1930s in Prague, so called Pachner Collection. The last comparative sample presents radiographs of the head and 3D surface models of faces of the recent society. Study of skeletal asymmetry of populations (Bigoni et al., v recenzním řízení, 2005; Kujanová et al., 2008), its level and localization, enables us to compare behavioral patterns, living conditions, socioeconomic differences and variability within and between populations (Mikulčice vs....
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