Effect of Age on Working Memory Performance and Cerebral Activation after Mild Traumatic Brain Injury: A Functional MR Imaging Study
| Autor: | Wei Shuan Wang, Wen Ta Chiu, David Yen Ting Chen, Ying Sheng Kuo, Changwei Wesley Wu, Ying Chi Tseng, Feng Xian Yan, Chi Jen Chen, Hui Ling Hsu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty Traumatic brain injury Poison control 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Neuroplasticity Injury prevention medicine Humans 0501 psychology and cognitive sciences Radiology Nuclear Medicine and imaging Prospective Studies Prospective cohort study Aged medicine.diagnostic_test Echo-Planar Imaging Working memory business.industry 05 social sciences Age Factors Magnetic resonance imaging Imaging study Middle Aged medicine.disease Magnetic Resonance Imaging Surgery Memory Short-Term Brain Injuries Anesthesia Female business 030217 neurology & neurosurgery |
| Zdroj: | Radiology. 278:854-862 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiol.2015150612 |
| Popis: | To evaluate the age effect on working memory (WM) performance and functional activation after mild traumatic brain injury (MTBI).This study was approved by the local research ethics committee. All participants provided written informed consent. N-back WM cerebral activation was assessed with functional magnetic resonance (MR) imaging in 13 younger (mean age, 26.2 years ± 2.9; range, 21-30 years) and 13 older (mean age, 57.8 years ± 6.6; range, 51-68 years) patients with MTBI and 26 age- and sex-matched control subjects. Two functional MR images were obtained within 1 month after injury and 6 weeks after the initial study. Group comparison and regression analysis were performed among postconcussion symptoms, neuropsychologic tests, and WM activity in both groups.In younger patients, initial hyperactivation was seen in the right precuneus and right inferior parietal gyrus (P = .047 and P = .025, respectively) in two-back greater than one-back conditions compared with younger control subjects, whereas in older patients, hypoactivation was seen in the right precuneus and right inferior frontal gyrus (P = .013 and P =.019, respectively) compared with older control subjects. Increased WM activity was associated with increased postconcussion symptoms in the right precuneus (r = 0.57; P = .026) and right inferior frontal gyrus (r = 0.60; P = .019) and poor WM performance in the right precuneus (r = -0.55; P = .027) in younger patients at initial studies but not in older patients. At follow-up examinations, partial recovery of activation pattern and decreased postconcussion symptoms (P = .04) were observed in younger patients but not in older patients.The different manifestations of postconcussion symptoms at functional MR imaging between younger and older patients confirmed the important role of age in the activation, modulation, and allocation of WM processing resources after MTBI. These findings also supported that younger patients have better neural plasticity and clinical recovery than do older patients. |
| Databáze: | OpenAIRE |
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