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Effects of sleep reduction on the phonological and visuospatial components of working memory.

Del Angel J, Cortez J, Juárez D, Guerrero M, García A, Ramírez C, Valdez P - Sleep Sci (2015)

Bottom Line: The objective of this study was to analyze the effects of sleep reduction for 5 days on the storage components of working memory.In the visual 2-Back section accuracy decreased (C=88.10±9.95%; SR1=82.45±11.57%; SR5=77.76±14.14%; F=10.80, p<0.05), and reaction time increased (C=810.02±173.96 ms; SR1=913.51±172.25 ms; SR5=874.78±172.27 ms; F=10.80, p<0.05) on the first and fifth day of sleep reduction.In conclusion, five days of sleep reduction produces a decrease in the phonological and visuospatial storage components of working memory, which may interfere with processing verbal information and solving problems that require spatial analysis.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, NL, Mexico.

ABSTRACT
Sleep reduction impairs the performance of many tasks, so it may affect a basic cognitive process, such as working memory, crucial for the execution of a broad range of activities. Working memory has two storage components: a phonological and a visuospatial component. The objective of this study was to analyze the effects of sleep reduction for 5 days on the storage components of working memory. Thirteen undergraduate students (18.77±2.20 years of age), 5 men and 8 women, responded two N-Back tasks (auditory and visual), with three sections each (0-Back, 1-Back, and 2-Back). These tasks were performed at 13:00 h under the following conditions: before sleep reduction (control; C); on the first (SR1), fourth (SR4), and fifth (SR5) days of sleep reduction (4 h of sleep per night); and one day after they slept freely (recovery, R). Sleep reduction produced a decrement in accuracy on the auditory 2-Back section the fifth day of sleep reduction (C=87.86±13.35%; SR5=74.76±16.37%; F=14.57, p<0.01). In the visual 2-Back section accuracy decreased (C=88.10±9.95%; SR1=82.45±11.57%; SR5=77.76±14.14%; F=10.80, p<0.05), and reaction time increased (C=810.02±173.96 ms; SR1=913.51±172.25 ms; SR5=874.78±172.27 ms; F=10.80, p<0.05) on the first and fifth day of sleep reduction. In conclusion, five days of sleep reduction produces a decrease in the phonological and visuospatial storage components of working memory, which may interfere with processing verbal information and solving problems that require spatial analysis.

No MeSH data available.


Auditory N-Back task. This task consists of presenting a series of auditory stimuli (syllables). It includes three sections: 0-Back, 1-Back, and 2-Back. During the 0-Back section, the participant must indicate whether each syllable presented is the same as the syllable presented at the beginning of the section. During the 1-Back section, the participant must indicate whether each syllable presented is the same as the one presented immediately prior. During the 2-Back section, the participant must indicate whether each syllable presented is the same as the syllable that appeared two events prior.
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f0005: Auditory N-Back task. This task consists of presenting a series of auditory stimuli (syllables). It includes three sections: 0-Back, 1-Back, and 2-Back. During the 0-Back section, the participant must indicate whether each syllable presented is the same as the syllable presented at the beginning of the section. During the 1-Back section, the participant must indicate whether each syllable presented is the same as the one presented immediately prior. During the 2-Back section, the participant must indicate whether each syllable presented is the same as the syllable that appeared two events prior.

Mentions: In the N-Back auditory task, the stimuli were the Spanish syllables Ce, Che, Gue, Ke, Le, Pe, Re, and Ye, recorded in stereo and emitted through the headphones. Each syllable had a maximum duration of 300 ms (Fig. 1). In the visual N-Back task the stimuli were black text boxes (font, Wingding 37), appearing in one of eight different positions around the center of the screen. The box could be located at 45°;, 135°;, 225°;, or 315° from the vertical axis, at either 4 or 8 cm from the center (Fig. 2).


Effects of sleep reduction on the phonological and visuospatial components of working memory.

Del Angel J, Cortez J, Juárez D, Guerrero M, García A, Ramírez C, Valdez P - Sleep Sci (2015)

Auditory N-Back task. This task consists of presenting a series of auditory stimuli (syllables). It includes three sections: 0-Back, 1-Back, and 2-Back. During the 0-Back section, the participant must indicate whether each syllable presented is the same as the syllable presented at the beginning of the section. During the 1-Back section, the participant must indicate whether each syllable presented is the same as the one presented immediately prior. During the 2-Back section, the participant must indicate whether each syllable presented is the same as the syllable that appeared two events prior.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4608896&req=5

f0005: Auditory N-Back task. This task consists of presenting a series of auditory stimuli (syllables). It includes three sections: 0-Back, 1-Back, and 2-Back. During the 0-Back section, the participant must indicate whether each syllable presented is the same as the syllable presented at the beginning of the section. During the 1-Back section, the participant must indicate whether each syllable presented is the same as the one presented immediately prior. During the 2-Back section, the participant must indicate whether each syllable presented is the same as the syllable that appeared two events prior.
Mentions: In the N-Back auditory task, the stimuli were the Spanish syllables Ce, Che, Gue, Ke, Le, Pe, Re, and Ye, recorded in stereo and emitted through the headphones. Each syllable had a maximum duration of 300 ms (Fig. 1). In the visual N-Back task the stimuli were black text boxes (font, Wingding 37), appearing in one of eight different positions around the center of the screen. The box could be located at 45°;, 135°;, 225°;, or 315° from the vertical axis, at either 4 or 8 cm from the center (Fig. 2).

Bottom Line: The objective of this study was to analyze the effects of sleep reduction for 5 days on the storage components of working memory.In the visual 2-Back section accuracy decreased (C=88.10±9.95%; SR1=82.45±11.57%; SR5=77.76±14.14%; F=10.80, p<0.05), and reaction time increased (C=810.02±173.96 ms; SR1=913.51±172.25 ms; SR5=874.78±172.27 ms; F=10.80, p<0.05) on the first and fifth day of sleep reduction.In conclusion, five days of sleep reduction produces a decrease in the phonological and visuospatial storage components of working memory, which may interfere with processing verbal information and solving problems that require spatial analysis.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, NL, Mexico.

ABSTRACT
Sleep reduction impairs the performance of many tasks, so it may affect a basic cognitive process, such as working memory, crucial for the execution of a broad range of activities. Working memory has two storage components: a phonological and a visuospatial component. The objective of this study was to analyze the effects of sleep reduction for 5 days on the storage components of working memory. Thirteen undergraduate students (18.77±2.20 years of age), 5 men and 8 women, responded two N-Back tasks (auditory and visual), with three sections each (0-Back, 1-Back, and 2-Back). These tasks were performed at 13:00 h under the following conditions: before sleep reduction (control; C); on the first (SR1), fourth (SR4), and fifth (SR5) days of sleep reduction (4 h of sleep per night); and one day after they slept freely (recovery, R). Sleep reduction produced a decrement in accuracy on the auditory 2-Back section the fifth day of sleep reduction (C=87.86±13.35%; SR5=74.76±16.37%; F=14.57, p<0.01). In the visual 2-Back section accuracy decreased (C=88.10±9.95%; SR1=82.45±11.57%; SR5=77.76±14.14%; F=10.80, p<0.05), and reaction time increased (C=810.02±173.96 ms; SR1=913.51±172.25 ms; SR5=874.78±172.27 ms; F=10.80, p<0.05) on the first and fifth day of sleep reduction. In conclusion, five days of sleep reduction produces a decrease in the phonological and visuospatial storage components of working memory, which may interfere with processing verbal information and solving problems that require spatial analysis.

No MeSH data available.