168
Matsuzawa, T., Evolution of the brain and social behavior in chimpanzees. Current Opinion in Neurobiology, 2013. 23 (3): p. 443–449.
169
Gunaydin, Lisa A., et al., Natural Neural Projection Dynamics Underlying Social Behavior. Cell. 157 (7): p. 1535–1551.
170
Gardner, E.L., Introduction: Addiction and Brain Reward and Anti-Reward Pathways. Advances in psychosomatic medicine, 2011. 30: p. 22–60.
171
Loken, L.S., et al., Coding of pleasant touch by unmyelinated afferents in humans. Nat Neurosci, 2009. 12 (5): p. 547–548.
172
Iggo, A., Cutaneous mechanoreceptors with afferent C fibres. The Journal of physiology, 1960. 152 (2): p. 337–353.
173
Insular cortex – Wikipedia. 2017; Available from: https://en.wikipedia.org/wiki/Insular_cortex.
174
Kalueff, A.V., J. L. La Porte, and C. L. Bergner, Neurobiology of grooming behavior. 2010: Cambridge University Press.
175
Claxton, G., Why can’t we tickle ourselves? Perceptual and Motor Skills, 1975. 41 (1): p. 335–338.
176
Keverne, E.B., N. D. Martensz, and B. Tuite, Beta-endorphin concentrations in cerebrospinal fluid of monkeys are influenced by grooming relationships. Psychoneuroendocrinology, 1989. 14 (1): p. 155–161.
