 In Jossophila melanogaster, the presence of glial cells around the axon of motor neurons allows for the formation of a myelin-like insulating layer. This layer is composed of stacked glial cell processes that form a lacuna structure, which collapses when there is an increase in the number of voltage-gated sodium and potassium channels. These channels are concentrated in the axon initial segment, where they are responsible for the rapid conduction of signals. This article was authored by Simone Ray, Henry Combe, Frederick Mosheref, and others.