title: Optical recording of neuronal activity in an invertebrate central nervous system: simultaneous monitoring of several neurons.
abstract: 1. Using an optical method for measuring membrane potential, we have been able to monitor action-potential activity simultaneously in 14 neurons of the supraesophageal ganglion of the barnacle. 2. Under favorable conditions, 4-mV synaptic potentials could also be detected optically.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002490:Central Nervous System / Q000166:cytology / Q000502:physiology*; D004582:Electronics, Medical; D008722:Methods; D009474:Neurons / Q000502:physiology; D001468:Thoracica / Q000502:physiology*