Long and skinny
Most neurons have lots of branches. Spindle neurons are different. They have a long, thin cell body with just one big branch at each end.
They live in only a few small spots deep in the front part of your brain. They are also called von Economo neurons, after Constantin von Economo, the scientist who described them.
Spindle neurons have been found in people, great apes, whales, dolphins, and elephants. These are all big-brained, social animals!