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Impairment of Cognitive Abilities and Decision Making after Chronic Use of Alcohol: The Impact of Multiple Detoxifications
Alcohol and Alcoholism , 06/04/09

Loeber S et al. - The results provide additional evidence for cognitive impairment of alcohol-dependent patients with regard to tasks sensitive to frontal lobe function and underline the importance of abstinence for these impairments to recover. The study found only little evidence for the impairing effects of repeated withdrawal on prefrontal function and we suggest that executive function is affected earlier in dependence.

Methods

Forty-eight alcohol-dependent patients were recruited from an inpatient detoxification treatment facility and cognitive function was compared to a control group of 36 healthy controls.
The patient population was then divided into a group of patients with less than two previous detoxifications (LO-detox group, n = 27) and a group of patients with two or more previous detoxifications (HI-detox group, n = 21) and cognitive function was compared.
In addition, cognitive function of recently (i.e. less than 16 days; median split) and longer abstinent patients was compared.
We assessed prefrontal function, memory function and intelligence.

Results

Alcoholics, when compared to healthy controls, performed worse with regard to the performance index Attention/Executive function.
Cognitive impairment in these tasks was pronounced in recently abstinent patients.
We found no significant differences between HI-detox and LO-detox patients with regard to the Attention/Executive function.
However, in the IOWA gambling Task, the HI-detox group seemed to be less able to learn to choose cards from the more advantageous decks over time.

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