Named neurons of the nervous system: a historical narrative review of discovery, function, and legacy

Many currently applied terms in neuroanatomy are rooted in important historical breakthroughs. Some discoveries become timeless, some evolve as knowledge advances, and others disappear into history before being rediscovered by a later generation. Purkinje cells, Betz cells, Golgi cells, Renshaw cells, and Onuf's nucleus are spoken of so routinely that their eponymous significance is not always immediately apparent. Yet each one reflects a moment of curiosity, a painstaking observation under a microscope, an inspired technical breakthrough, or, at times, an intense scientific rivalry. The history of named neurons mirrors the history of neuroscience. As microscopy and histological staining techniques improved, anatomists were able to see structures that had previously been invisible, transforming the nervous system from an indistinct mass into an intricate landscape of specialized cells. Some discoveries, such as Golgi's staining method and Cajal's neuron doctrine, reshaped biology forever (Golgi, 1873; Ramón y Cajal, 1906). Others were slower to be recognized: von Economo neurons, for example, were described, forgotten for nearly seven decades, and only later recognized as a distinct neuronal population (Betz, 1881, as cited in Butti et al. 2013; von Economo, 1926; Nimchinsky et al. 1999). This review follows these remarkable journeys, exploring neurons named after their discoverers alongside those named for their appearance or function, including chandelier cells, place cells, mirror neurons, and concept cells. Together, they demonstrate the depth of many familiar names in neuroanatomy-not merely as descriptive labels, but also as windows into the history, ingenuity, and enduring curiosity that continues to shape modern neuroscience.