Printed in Great Britain FURTHER STUDIES ON SYNAPTIC TRANSMISSION IN INSECTS I. EXTERNAL RECORDING OF SYNAPTIC POTENTIALS IN A SINGLE GIANT AXON OF THE COCKROACH, PERIPLANETA AMERICANA L.

During recent years the use of the micro-electrode technique has resulted in con-siderable progress in the study of synaptic transmission at the unitary level. This technique has, for example, been intensively used for giant somata such as the moto-neurones of the anterior horn of the spinal cord of the cat (Coombs, Eccles & Fatt