Facilitatory effects of 5-hydroxy-tryptamine on the crayfish neuromuscular junction

Abstract

The effect of 5-hydroxy-tryptamine (5 HT) on synaptic transmission in crayfish muscle was analysed by recording extracellularly potential changes at single synapses. After stimulation of the motor nerve fiber an excitatory postsynaptic potential (epsp) of the muscle fiber is …