[Sequence acquisition by the right and the left hands: positional and vector coding]

Sequence acquisition by the right and the left hands were studied in 47 blindfold right-handed subjects. The errors of positional or vector coding were estimated as a distance between positions of the hand moved by the experimenter and by a subject on his/her own or as an angle between vectors connecting the successive positions of the hand moved by the experimenter and the subject. The percentages of errors in performance with the right and the left hands did not differ, but the values of positional errors were lower for the right hand. The higher was the amplitude of the movement, the lower were vector errors and higher positional error. The vector coding was predominant in case of the right-hand movements, but prevalence of positional or vector coding was non-significant for the left hand. The results were simulated by the model on the basis of the heteroassociative network.