Features of the Inhibition of Distracting Stimuli in Mild Cognitive Impairment.

Autor: Velichkovsky, B. B., Tatarinov, D. V., Khlebnikova, A. A., Roshchina, I. F., Selezneva, N. D., Gavrilova, S. I.
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Zdroj: Neuroscience & Behavioral Physiology; Nov2021, Vol. 51 Issue 9, p1216-1221, 6p
Abstrakt: Objectives. To study the effectiveness of the inhibition of interfering visual stimuli using a flanker task in groups of cognitively healthy young, middle-aged, and elderly people and patients with mild cognitive impairment. Materials and methods. The rate and accuracy of responses were analyzed and a diffusion model of reaction times which extracts components of reaction times associated with perceptual and motor response processes, stimulus processing speed, and conservativeness (caution) in response selection was developed. Results and conclusions. Significant reductions in the rate and accuracy of responses with age were demonstrated, especially in the group of patients with mild cognitive impairment. Decreased efficacy in inhibiting distracting stimuli was particularly marked for noncongruent distractors in patients. Analysis of the parameters of the diffusion model demonstrated increases in the duration of perceptual and motor processes with age, decreases in patients' processing speed, and increases in the conservativeness of responses in patients in noncongruent tests. These results point to combined influences of the processes of normal and pathological aging on cognitive functioning in mild cognitive impairment. Slowing of the perceptual-motor components of reaction times reflects processes of normal cognitive aging, while slowing of processing speed (in the presence of any distractor, including congruent) characterizes pathological cognitive aging. Differential diagnosis of normal and pathological cognitive changes can be obtained using data based on analysis of reaction time components. We conclude that consideration of conservativeness in response selection is important as a factor slowing reaction times in pathological and normal cognitive aging. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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