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Hebbian theory
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== Hebbian theory and cognitive neuroscience == Hebbian learning is linked to cognitive processes like decision-making and social learning. The field of cognitive neuroscience has started to explore the intersection of Hebbian theory with brain regions responsible for reward processing and social cognition, such as the striatum and prefrontal cortex.<ref>Balleine, B. W., & O'Doherty, J. P. (2010). Human and rodent homologies in action control: Corticostriatal mechanisms of reward and decision making. *Neuroscience*, 164(1), 131-140.</ref><ref>O'Doherty, J. P., et al. (2004). Dissociable roles of ventral and dorsal striatum in instrumental conditioning. *Science*, 304(5668), 452-454.</ref> In particular, striatal projections exposed to Hebbian models exhibit long-term potentiation and long-term depression ''in vivo''.<ref>{{Cite journal |last1=Perrin |first1=Elodie |last2=Venance |first2=Laurent |date=2019-02-01 |title=Bridging the gap between striatal plasticity and learning |url=https://www.sciencedirect.com/science/article/pii/S0959438818300497 |journal=Current Opinion in Neurobiology |series=Neurobiology of Learning and Plasticity |volume=54 |pages=104β112 |doi=10.1016/j.conb.2018.09.007 |pmid=30321866 |issn=0959-4388}}</ref> Additionally, models of the prefrontal cortex to stimuli ("mixed selectivity") are not entirely explained by random connectivity, but when a Hebbian paradigm is incorporated, the levels of mixed selectivity in the model are reached.<ref>{{Cite journal |last1=Lindsay |first1=Grace W. |last2=Rigotti |first2=Mattia |last3=Warden |first3=Melissa R. |last4=Miller |first4=Earl K. |last5=Fusi |first5=Stefano |date=2017-11-08 |title=Hebbian Learning in a Random Network Captures Selectivity Properties of the Prefrontal Cortex |url=https://www.jneurosci.org/content/37/45/11021.abstract |journal=Journal of Neuroscience |language=en |volume=37 |issue=45 |pages=11021β11036 |doi=10.1523/JNEUROSCI.1222-17.2017 |issn=0270-6474 |pmid=28986463|pmc=5678026 }}</ref> It is hypothesized that Hebbian plasticity in these areas may underlie behaviors like habit formation, reinforcement learning, and even the development of social bonds.
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