Abstract
During the mid 1800s, the discovery of two large reticulospinal neurons, commonly known as Mauthner cells, in the brain stems of most fishes and amphibians, ushered in a new era of vertebrate neurophysiology. These cells are easily studied and have provided key insights into cellular excitability and synaptic transmission. Across species, they share consistent morphology, neurophysiology, receptor mechanisms, and synaptic connectivity, playing a central role in initiating rapid escape responses. Research on Mauthner cells has significantly advanced multiple fields, including evolutionary biology, cellular physiology, and behavior, making them an ideal model for exploring the interplay between form, function, and behavior.