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Wykład Associate Professor Andrzeja Przybyły

Title: Brain lateralization of motor functions: implications to arm choice behavior and bimanual coordination. Katedra Antropomotoryki serdecznie zaprasza we wtorek (05.06.2018 r.) o godz. 13.00 w sali 30 P9, na wykład Associate Professor Andrzeja Przybyły, naszego specjalnego gościa z Physical Therapy Department University of North Georgia. Wykład i dyskusją odbędą się w języku polskim, więc będzie możliwości swobodnej wymiany poglądów. Zainteresowanych serdecznie zapraszamy.

Abstract: Previous studies have indicated that handedness, similarly to language and cognition, is associated with brain lateralization, thus hemispheric specializations for different aspects of sensorimotor performance. In particular, Sainburg (2002) developed the Dynamic-Dominance Hypothesis providing evidence that right handers, 80-90% of population, have the left hemisphere specialized in controlling movement dynamics resulting in the right dominant arm proficiencies in dynamic tasks such as reaching or throwing. In turn, the right hemisphere is specialized in controlling movement impedance resulting in the left non-dominant arm proficiencies in postural stability, i.e. holding bread during slicing. In terms of human arm kinematics during reaching movements, the right arm-left hemisphere is able to produce straighter movement trajectories, and the left arm-right hemisphere is able to produce relatively good accuracy. In this talk, I will present data linking these interlimb differences in movement control specializations to asymmetrical patterns of arm choice behavior. I will show that this asymmetrical patterns of arm choice behavior are updated and modified with respect to present sensorimotor conditions and can be modified by an intense long-term training. I will also show evidence that these interlimb differences in movement control specializations are maintained during bimanual coordination. These findings imply individual control of each arm and synergistic coordination rather than one controller driving both arms resulting in a coupling between the two arms.