Spindle Neurons, Salience Network, & Social Behaviors

In this episode we explore spindle neurons, also known as von Economo neurons (VENs), discovered by Constantine von Economo in the 1920s. These large, cylinder-shaped cells, found in the anterior cingulate cortex (ACC), anterior (or called frontoinsula) insula, and rarely the dorsolateral prefrontal cortex (DLPFC), are crucial for rapid communication in social behaviors. Three key points stand out: first, spindle neurons are located exclusively in the ACC and insula, the core hubs of the salience network, which is disrupted in autism as early as six weeks of age, as shown in a UCLA study. Second, these neurons are primarily involved in social behaviors, underpinning complex interactions in humans and other social species. Third, they are rare, found only in highly social animals like great apes, cetaceans, and possibly elephants, highlighting the ...