Department;
of;
Physiology;
Department;
of;
Physiology;
Medical;
School;
of;
Xi’an;
Jiaotong;
University;
Xi’an;
710061;
China;
Medical;
School;
of;
Xi’an;
Jiaotong;
University;
China;
red; nucleus; (RN); antinociception; wide; dynamic; range(WDR); neuron; muscle; spindle;