An Exception to Contralateral Dominance of Cerebral Cortex: From Abstract to Concrete

The cerebral cortex usually governs contralateral body parts in sensation and movements. rule of dominance is well established on the basis a long history human animal experiments. We also confirmed for primary (M1) secondary (M2) motor cortices controlling unilateral forelimb movements behaving rats. However, we found that their posterior parietal (PPC) neurons preferentially represent ipsilateral movements, contrast to preference M1 M2 neurons. Moreover, our optogenetic activation PPC evoked ipsilaterally biased Even weak affected task performance I will talk about interpretation these paradoxical observations from point view an evolutional difference between rodents primates.