Antropomotoryka nr 57 [2012]. - Akademia Wychowania Fizycznego ...

Functional and dynamic asymmetry in boys aged 10–12 years Figure 2. Comparison of eyedness direction in researched group of boysA comparison of examined boys with regard tochanges of direction in footedness showed changes ina decreasing proportion of subjects with undeterminedfootedness and left-footedness in favor of right-footedsubjects (Fig. 3).All things considered, it seems that in the investigatedgroup of boys, the biggest changes pertaining tosettling the direction of asymmetry took place betweenthe ages of 10 and 11 years. Among 11-year-olds therewere no subjects that represented an unspecified directionof asymmetry in all examined organs. Changeswhich appeared between the ages of 11 and 12 yearsturned out to be only a few and related to an increasingnumber of individuals with right-direction in the examinedmotor and sense organs.What followed was an analysis of the status andchanges in the area of the profile of functional asymmetry.In the examined group of 10-year-old boys, a determinedheterogeneous profile (51%) predominates. Yet 19% of them represent still an undetermined profile. Among11-year-old boys, a still determined heterogeneous profile(61%) prevails; there are, however, no subjects ofundetermined profile, and 39 % of the examined grouprepresents a determined homogeneous profile. In thegroup of 12-year-old boys, a determined homogeneousprofile predominates (65%). In this connection, we caneasily observe that with regard to the profile of asymmetry,similar to its direction, the biggest changes took placebetween the ages of 10 and 11 years. However, betweenthe ages of 11 and 12 years, minor changes occurredpertaining to the increase in the number of individualswith a determined homogeneous profile (Fig. 4).To sum up the changes in functional asymmetry inthe period of two years, in the examined boys, it should Figure 3. Comparison of footedness direction in researched group of boys– 77 –