Chimp Human Brain
Laboratory for Darwinian Neuroscience
Department of Anthropology
Emory University

James K Rilling::Laboratory for Darwinian Neuroscience::Lab Mission

DTI color map of rhesus macaque brain

DTI color map of rhesus
macaque brain

The Mission of the Laboratory for Darwinian Neuroscience is two-fold. One goal is to advance our understanding of hominid brain evolution through comparing the brains of modern humans with non-human primate brains using a variety of non-invasive brain imaging technologies, including magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), positron emission tomography (PET) and diffusion tensor imaging (DTI). These methods enable comparisons of brain structure and function between humans and non-human primates. Ongoing research projects related to this goal include:

  • Using  diffusion tensor imaging (DTI) to compare cortical connectivity in humans, great apes and monkeys
  • Using fMRI to describe networks of functional connectivity in chimpanzees
  • Using PET imaging to compare the neural substrates of resting state cognition and social cognition in chimpanzees and humans
18 F-FDG PET scan from an adult female chimpanzee

18 F-FDG PET scan from an adult
female chimpanzee

A second goal is to begin mapping the evolved social psychology of the human brain. We are interested in exploring the neural basis of human social cognition and behavior, particularly those aspects that have been under strong evolutionary selection pressure. Ongoing research projects related to this goal include:

  • A fMRI investigation of the neural bases of reciprocated and unreciprocated cooperation
  • An fMRI investigation of the neural correlates of the perception of more and less dominant male faces

Structural MRI scan of adult male chimpanzee
fMRI activation in the anteroventral striatum, specific to the outcome of mutual cooperation in a Prisoner’s Dilemma Game
Structural MRI scan of adult human female

Left: Structural MRI scan of adult male chimpanzee
Center: fMRI activation in the anteroventral striatum, specific to the outcome of mutual cooperation in a Prisoner’s Dilemma Game
Right: Structural MRI scan of adult human female