کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5631648 1580860 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dissociable frontostriatal white matter connectivity underlies reward and motor impulsivity
ترجمه فارسی عنوان
اتصال متقابل ماده سفید قبل از انقباض، پاداش و تکانشی حرکتی است
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی


- White matter connectivity associated with distinct impulsivity subtypes.
- Ventral striatum-vmPFC connectivity specifically predicts delay discounting.
- Dorsal striatum-SMA connectivity particularly predicts go/no-go performance.
- Suggests distinct frontostriatal circuitry underlie motor and reward control.
- Inter-regional structural connectivity seems key for complex behaviors.

Dysfunction of cognitive control often leads to impulsive decision-making in clinical and healthy populations. Some research suggests that a generalized cognitive control mechanism underlies the ability to modulate various types of impulsive behavior, while other evidence suggests different forms of impulsivity are dissociable, and rely on distinct neural circuitry. Past research consistently implicates several brain regions, such as the striatum and portions of the prefrontal cortex, in impulsive behavior. However the ventral and dorsal striatum are distinct in regards to function and connectivity. Nascent evidence points to the importance of frontostriatal white matter connectivity in impulsivity, yet it remains unclear whether particular tracts relate to different control behaviors. Here we used probabilistic tractography of diffusion imaging data to relate ventral and dorsal frontostriatal connectivity to reward and motor impulsivity measures. We found a double dissociation such that individual differences in white matter connectivity between the ventral striatum and the ventromedial prefrontal cortex and dorsolateral prefrontal cortex was associated with reward impulsivity, as measured by delay discounting, whereas connectivity between dorsal striatum and supplementary motor area was associated with motor impulsivity, but not vice versa. Our findings suggest that (a) structural connectivity can is associated with a large amount of behavioral variation; (b) different types of impulsivity are driven by dissociable frontostriatal neural circuitry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 150, 15 April 2017, Pages 336-343
نویسندگان
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