This cluster of papers explores the genetic basis and molecular mechanisms underlying various neuropathies, including Charcot-Marie-Tooth disease, hereditary spastic paraplegia, and related disorders. It covers topics such as genetic mutations, axonal degeneration, nerve growth factor, mitochondrial dysfunction, and microtubule dynamics. The research also delves into the role of neurofilament mutations and ganglioside-induced differentiation in these neuropathies.