No one fully understands how plasticity operates at all its various levels, from electrical pulses and neurotransmitters on up to the synapses, networks and specialized regions of the brain.

• 至于神经系统的各个层次，从电脉冲、神经传递物，直到突触、神经网络以及大脑的特化区域，怎样合作表现出可塑性，也没有人清楚。