Paul Ivan Yakovlev (December 28, 1894 – June 16, 1983) was a Russian-American neuroanatomist who worked at Harvard Medical School. He is the namesake of the Yakovlevian torque, an asymmetry of human brains. He made contributions in the "origins of the frontopontine tract in humans, neurocutaneous syndromes and epilepsy, neuronal substrates and epilepsy, schizencephaly, arhinencephalia, mental retardation, decussation of the bulbar pyramidal tract, frontal lobotomies, the limbic cortex, the time of myelination and the anatomy of the limbic cortex, corpus callosum, and thalamus, and two classic anatomical atlases."[1]