An influential, but controversial, view that emotions represent a continuous space of possibilities rather than discrete kinds
Feldman Barrett, L. (2006). Are emotions natural kinds?. Perspectives on Psychological Science, 1, 28–58.
An fMRI study that endorsed the claim that mirror systems act as a mechanism for empathy: they find that seeing facial expressions activates both “mirror regions” and parts of the emotional brain
Carr, L., Iacoboni, M., Dubeau, M. C., Mazziotta, J. C., & Lenzi, G. L. (2003). Neural mechanisms of empathy in humans: A relay from neural systems for imitation to limbic areas. Proceedings of the National Academy of Sciences of the United States of America, 100(9), 5497–5502.
An overview of the orbitofrontal cortex and its role in emotions and in guiding behavior
Kringelbach, M. L. (2005). The human orbitofrontal cortex: Linking reward to hedonic experience. Nature Reviews Neuroscience, 6, 691–702.
One of the first pieces of empirical evidence linking autism with a deficit in mirroring
Oberman, L. M., Hubbard, E. M., McCleery, J. P., Altschuler, E. L., Ramachandran, V. S., & Pineda, J. A. (2005). EEG evidence for mirror neuron dysfunction in autism spectrum disorders. Cognitive Brain Research, 24, 190–19.8.