ntrols performed the task. That is, the underlying component processes used to execute this task were different. Unable to invoke normal visuoperceptual abilities, alcoholics relied on a more complex cognitive system to perform the visuoperceptual learning task than required by controls. The potential problem with this is that if that same system frontal executive functions is needed for a competing task, alcoholics may be at a disadvantage because that system would otherwise be engaged, for example, driving, or work-related demands that require sequencing, judgment, decision making, complex tasks requiring organization, planning, and visuospatial information, like dentistry, or using heavy machinery in construction."
"To me the findings suggest that alcoholics will simply have to exert more cognitive energy to complete tasks," said Nixon. "The long-term cost of this expenditure might be seen in any or all of several ways, such as chronic fatigue, lack of vigilance, and distractibility."
Alcoholics, especially older ones, exhibit another difference from controls in terms of memory strategy invoked when performing the incomplete figures task after a day's delay. Controls can enhance visuoperceptual learning (that is, improve identification of incomplete figures) with parallel information recalled from the declarative memory system (that is, the name of the identity of figures). Even though the declarative memory system is intact in nonamnesic alcoholics, they do not appear to take advantage of that information to aid the perceptual memory recall process.
Sullivan and her colleagues plan to continue with their research. "We are currently examining visuoperception and visuoperceptual learning among individuals with alcoholism-related amnesic Korsakoff syndrome," said Sullivan. (Korsakoff's psychosis is characterized by the inability of an individual to retain new information, such as remembering people recently met.)
Page: 1 2 3 Related medicine news :1
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