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In Parkinson\u2019s disease, it has been associated with the expression of impulse control disorders, a highly prevalent non\u2010motor complication. Even though multiple tests of impulsivity have been used in this context, the impact of test choice has not been addressed. The aim was to evaluate whether different impulsivity measures in Parkinson\u2019s disease share substantial inter\u2010scale and anatomical correlations or rather mirror different underlying phenomena.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In a consecutive sample of 89 Parkinson\u2019s disease patients without impulse control disorders, four common tests were evaluated assessing different aspects of impulsivity: impulsiveness trait, decisions under implicit risk with and without losses, and delay discounting. Correlations among test scores were analysed and each score was used as a regressor in a set of grey matter volume (GMV) voxel\u2010based morphometry analyses to explore their brain structural correlates.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>No significant correlations were found between the different impulsivity tests. Furthermore, their structural brain correlates were divergent. Impulsiveness trait appeared to be associated with lower GMV in dorsal\u2013lateral prefrontal cortices, implicit risk (with losses) with higher GMV in the left nucleus accumbens and lower left insular GMV, implicit risk (without losses) with higher GMV in the left lingual gyrus and lower GMV in the gyri recti and delay discounting with higher GMV in the left nucleus accumbens.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In Parkinson\u2019s disease, different impulsivity measures reflect very dissimilar behavioural and brain structural correlates. Our results suggest that parkinsonian impulsivity is not a unitary phenomenon but rather a heterogeneous entity.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ene.14235","type":"journal-article","created":{"date-parts":[[2020,4,6]],"date-time":"2020-04-06T14:04:47Z","timestamp":1586181887000},"page":"1478-1486","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Measuring impulsivity in Parkinson\u2019s disease: a correlational and structural neuroimaging study using different tests"],"prefix":"10.1111","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0008-2360","authenticated-orcid":false,"given":"J.","family":"Mar\u00edn\u2010Lahoz","sequence":"first","affiliation":[{"name":"Movement Disorders Unit Neurology Department Sant Pau Hospital Barcelona Spain"},{"name":"Institut d\u00b4Investigacions Biom\u00e8diques\u2010Sant Pau (IIB\u2010Sant Pau) Barcelona Spain"},{"name":"Universitat Aut\u00f2noma de Barcelona (U.A.B.) 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