Effects of L-Glutamate Microinjection into the Ventral Horn of Spinal Cord Gray Matter on Gastrocnemius Contractility in Toad
向蟾蜍脊髓灰质腹角注射谷氨酸钠对腓肠肌收缩的影响

A diagram of motor neuron pool of ventral horn of spinal cord gray matter in toad was first delineated.Different concentrations (1,0.5,0.1,0.01 mol/L) of excitatory amino acid L-Glu or physiological saline (0.65% NaCl) were then microinjected into the motor neuron pool in a urethane-anaesthetized toad.The contraction curve of the gastrocnemius was then recorded by the BL-420 Physiological Signal Recording.We took the maximal tension,the duration of rising phase,the velocity of tension variation,and the dura...