Mild head injury and sympathetic arousal: investigating relationships with decision-making and neuropsychological performance in university students.

Abstract:

SUMMARY:The purpose of this study was to examine the relationships between neuropsychological performance, physiological arousal and decision-making in university students who have or have not reported a history of mild head injury (MHI). METHODS:Forty-four students, 18 (41%) reporting a history of MHI, performed a design fluency task and the Iowa Gambling Task (IGT) while electrodermal activity (EDA) was recorded. RESULTS:General cognitive ability and overall choice outcomes did not differ between groups. However, self-reported MHI severity predicted decision-making performance such that the greater the neural indices of trauma, the more disadvantageous the choices made by participants. As expected, both groups exhibited similar base levels of autonomic arousal and physiological responses to reward and punishment outcomes; however, those reporting MHI produced significantly lower levels of EDA during the anticipatory stages of decision-making. CONCLUSIONS:Overall, these findings encourage the acceptance of head injury as being on a continuum of brain injury severity, as MHI can emulate neurophysiological and neuropsychological features of more traumatic cases and may be impacting mechanisms which sustain adaptive social decision-making.

journal_name

Brain Inj

journal_title

Brain injury

authors

van Noordt S,Good D

doi

10.3109/02699052.2011.580312

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

707-16

issue

7-8

eissn

0269-9052

issn

1362-301X

journal_volume

25

pub_type

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