Looking more closely at this model, deficits in some cognitive functions may result from task difficulty alone and/or decline in the brain’s overall cognitive capacity, as opposed to specific deficits related to lesions in a certain brain region. Because of its lack of specificity, the diffuse brain dysfunction model more adequately explains these findings of left and right hemisphere deficits than do the other models. This model can explain adequately a large portion of the deficit patterns observed in alcoholics.
