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Loss of control over alcohol use has been proposed to be mediated by a combination of habitual substance use, caused by functional changes in the dorsolateral striatum (DLS), and breakdown of cognitive control over alcohol use, subserved by cortical areas. We have previously shown that a subgroup of Lister Hooded rats develops loss of control over alcohol seeking after voluntary intermittent\u2010every\u2010other\u2010day consumption of alcohol. The aim of this study was therefore to determine the effects of long\u2010term voluntary alcohol consumption on sensorimotor cortical inputs to the DLS in subgroups of rats that had consumed low versus high amounts of alcohol. To that end, optogenetics and patch\u2010clamp electrophysiology were combined to investigate functional changes in cortical projections to the DLS after 8\u2009weeks of voluntary alcohol consumption. We observed lower AMPA\/NMDA ratios in alcohol\u2010consuming rats, indicative of long\u2010term depression of this projection upon exposure to alcohol. We observed a reduced coefficient of variance and, selectively in high alcohol drinking rats, an increase in paired\u2010pulse facilitation. This indicates that voluntary alcohol consumption induces both post\u2010 and presynaptic changes in the sensorimotor cortical inputs to the DLS. These findings show that alcohol consumption affects corticostriatal plasticity, which might contribute to the development of AUD.<\/jats:p>","DOI":"10.1111\/ejn.70602","type":"journal-article","created":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T09:33:32Z","timestamp":1782984812000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of Voluntary Alcohol Consumption on Corticostriatal Plasticity in Rats"],"prefix":"10.1111","volume":"64","author":[{"given":"Johanna A. 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