Disruptions in Functional Network Connectivity During Alcohol Intoxicated Driving
Version of Record online: 17 DEC 2009
Copyright © 2009 by the Research Society on Alcoholism
Alcoholism: Clinical and Experimental Research
Volume 34, Issue 3, pages 479–487, March 2010
How to Cite
Rzepecki-Smith, C. I., Meda, S. A., Calhoun, V. D., Stevens, M. C., Jafri, M. J., Astur, R. S. and Pearlson, G. D. (2010), Disruptions in Functional Network Connectivity During Alcohol Intoxicated Driving. Alcoholism: Clinical and Experimental Research, 34: 479–487. doi: 10.1111/j.1530-0277.2009.01112.x
- Issue online: 2 MAR 2010
- Version of Record online: 17 DEC 2009
- Received for publication May 13, 2009; accepted October 6, 2009.
- Virtual Reality;
- Driving While Intoxicated;
Background: Driving while under the influence of alcohol is a major public health problem whose neural basis is not well understood. In a recently published functional magnetic resonance imaging (fMRI) study (Meda et al., 2009), our group identified 5, independent critical driving-associated brain circuits whose inter-regional connectivity was disrupted by alcohol intoxication. However, the functional connectivity between these circuits has not yet been explored in order to determine how these networks communicate with each other during sober and alcohol-intoxicated states.
Methods: In the current study, we explored such differences in connections between the above brain circuits and driving behavior, under the influence of alcohol versus placebo. Forty social drinkers who drove regularly underwent fMRI scans during virtual reality driving simulations following 2 alcohol doses, placebo and an individualized dose producing blood alcohol concentrations (BACs) of 0.10%.
Results: At the active dose, we found specific disruptions of functional network connectivity between the frontal-temporal-basal ganglia and the cerebellar circuits. The temporal connectivity between these 2 circuits was found to be less correlated (p < 0.05) when driving under the influence of alcohol. This disconnection was also associated with an abnormal driving behavior (unstable motor vehicle steering).
Conclusions: Connections between frontal-temporal-basal ganglia and cerebellum have recently been explored; these may be responsible in part for maintaining normal motor behavior by integrating their overlapping motor control functions. These connections appear to be disrupted by alcohol intoxication, in turn associated with an explicit type of impaired driving behavior.