Interhemispheric Differences Of Lateralized Implicit Sequence Motor Learning In Bi-manual Conditions

In recent years the popular paradigm of study in implicit learning turned from the artificial grammar paradigm into the sequence learning. As one of the most important paradigm of implicit learning, serial reaction time task (SRT) also plays an essential role in the study of motor learning. Sequence tasks always exist in the process of motor learning skills, and researchers started paying more attention on the cognitive activities in the process of motor sequence learning rather than only focus on the movement performance, thus the brain comes to a hot issue which researchers will always explore in the process of implicit sequence learning. Inter-hemispheric interaction (IHI) is one of the important projects of brain mechanisms in motor sequence learning.This thesis select subjects from East China Normal University (common undergraduate students and athlete-undergraduate students from the college of Physical Education and Health). Using the letter detection task, SRT task at the same time to find out the inter-hemispheric interaction in bi-manual conditions and the interference effect of complex movement sequences. Results showed that:(1) Interhemispheric differences were existed in all of three different sport levels of subjects. It revealed that the right hemisphere (RH) has higher sensitivity to the processing of novel sequential material than the left hemisphere (LH) in this bimanual condition.(2) There were significant differences between sports levels of subjects in rection time (RT) which indicated that sports level is an important factor in the impact of the motor sequence learning. Second national level of athletes had better performance than common subjects in sequence learning, especially on the RH, but there were no significant differences between second national level of athletes and first level of athletes, even the advantages of the right brain is not significant, however, RH was better suited to the novel material in the retention test.(3) There were significant differences between projects majored in different sports items in the group of second national level of athletes, it mainly showed that basketball, football player had better performance than table tennis players.(4) Compared the performance of simple task and complex task finished by second national level athletes. Results showed that there was significant difference between RH and LH, RH was better suited to the novel material in the simple sequence test. RH was better suited to the novel material at the beginning of learning complex sequence test, but the advantage decreased by learning task, and there was no significant difference between RH and LH at the end of learning complex sequence task.