The myeloarchitecture of impulsivity:premature responding in youth is associated with decreased myelination of ventral putamen
Autor: | Valerie Voon, Mads Uffe Pedersen, Seung-Goo Kim, Mads Jensen, Kristine Rømer Thomsen, Camilla L. Nord, Timo L. Kvamme, Mette Buhl Callesen |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Adult
Male Serial reaction time Adolescent media_common.quotation_subject CHILDHOOD HEROIN-ADDICTS Grey matter Impulsivity Article Young Adult 03 medical and health sciences 0302 clinical medicine Reaction Time medicine Humans WAITING IMPULSIVITY Myelin Sheath media_common TRAIT IMPULSIVITY Pharmacology REACTION-TIME-TASK business.industry Addiction Putamen PSYCHOPATHOLOGY GRAY-MATTER PERFORMANCE medicine.disease HUMAN BRAIN 030227 psychiatry Psychiatry and Mental health Eating disorders medicine.anatomical_structure Delay Discounting Endophenotype Impulsive Behavior RISK-FACTORS Female medicine.symptom business Neurocognitive Psychomotor Performance 030217 neurology & neurosurgery Clinical psychology |
Zdroj: | Nord, C L, Kim, S-G, Callesen, M B, Kvamme, T L, Jensen, M, Pedersen, M U, Thomsen, K R & Voon, V 2019, ' The myeloarchitecture of impulsivity : premature responding in youth is associated with decreased myelination of ventral putamen ', Neuropsychopharmacology, vol. 44, pp. 1216-1223 . https://doi.org/10.1038/s41386-019-0343-6 Nord, C L, Kim, S G, Callesen, M B, Kvamme, T L, Jensen, M, Pedersen, M U, Thomsen, K R & Voon, V 2019, ' The myeloarchitecture of impulsivity : premature responding in youth is associated with decreased myelination of ventral putamen ' Neuropsychopharmacology, vol. 44, no. 7, pp. 1216-1223 . https://doi.org/10.1038/s41386-019-0343-6 Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology |
Popis: | Impulsivity has been suggested as a neurocognitive endophenotype conferring risk across a number of neuropsychiatric conditions, including substance and behavioural addictions, eating disorders, and attention deficit/hyperactivity disorder. We used a paradigm with interspecies translation validity (the four-choice serial reaction time task, 4CSRTT) to assess 'waiting' impulsivity in a youth sample (N = 99, aged 16-26 years). We collected magnetization prepared two rapid acquisition gradient echo (MP2RAGE) scans, which enabled us to measure R1, the longitudinal relaxation rate, a parameter closely related to tissue myelin content, as well as quantify grey matter volume. We also assessed inhibitory control (commission errors) on a Go/NoGo task and measured decisional impulsivity (delay discounting) using the Monetary Choice Questionnaire (MCQ). We found R1 of the bilateral ventral putamen was negatively correlated with premature responding, the index of waiting impulsivity on the 4CSRTT. Heightened impulsivity in youth was significantly and specifically associated with lower levels of myelination in the ventral putamen. Impulsivity was not associated with grey matter volume. The association with myelination was specific to waiting impulsivity: R1 was not associated with decisional impulsivity on the MCQ or inhibitory control on the Go/NoGo task. We report that heightened waiting impulsivity, measured as premature responding on the 4CSRTT, is specifically associated with lower levels of ventral putaminal myelination, measured using R1. This may represent a neural signature of vulnerability to diseases associated with excessive impulsivity and demonstrates the added explanatory power of quantifying the mesoscopic organization of the human brain, over and above macroscopic volumetric measurements. |
Databáze: | OpenAIRE |
Externí odkaz: |