INTRACELLULAR-RECORDINGS FROM SYMPATHETIC PREGANGLIONIC NEURONS

In anaesthetised cats the response of the soma dendritic region of sympathetic preganglionic neurones (SPN) recorded intracellularly in T3 spinal segment was studied following excitation of third thoracic white ramus and following orthodromic inputs. Most cells had action potentials of short duration. Many cells were active. Decreases in membrane potential were relatively short lasting, < 40 msec and a change of 5 mV was sufficient to discharge the cell. Increases in membrane potential were also evident. © 1979.