کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
930240 | 1474450 | 2011 | 8 صفحه PDF | دانلود رایگان |
Alterations in working memory (WM) are common after traumatic brain injury (TBI). Frontal catecholaminergic systems, including the alpha-2 adrenergic system, modulate WM function and may be affected in TBI. We hypothesized that administration of an alpha-2 adrenergic agonist might improve WM after mild TBI (MTBI). Thirteen individuals with MTBI 1 month after injury and 14 healthy controls (HC) were challenged with guanfacine and placebo prior to administration of a verbal WM functional MRI task. Guanfacine was associated with improved WM performance in the MTBI but not the HC group. On guanfacine the MTBI group showed increased activation within a WM task-specific region of interest. Findings are consistent with the hypothesis that alterations in WM after MTBI may be improved with the alpha-2 agonist guanfacine.
Research highlights
► Individuals with MTBI differed from controls in response to guanfacine.
► The MTBI group showed improved working memory (WM) performance on guanfacine.
► Improved WM performance was associated with increased activation of frontal WM cortex.
Journal: International Journal of Psychophysiology - Volume 82, Issue 1, October 2011, Pages 107–114