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  • 1
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    Complementary neural mechanisms for tracking items in human working memory (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-29
    Description: Recognition of a specific visual target among equally familiar distracters requires neural mechanisms for tracking items in working memory. Event-related functional magnetic resonance imaging revealed evidence for two such mechanisms: (i) Enhanced neural responses, primarily in the frontal cortex, were associated with the target and were maintained across repetitions of the target. (ii) Reduced responses, primarily in the extrastriate visual cortex, were associated with stimulus repetition, regardless of whether the stimulus was a target or a distracter. These complementary neural mechanisms track the status of familiar items in working memory, allowing for the efficient recognition of a currently relevant object and rejection of irrelevant distracters.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Y -- Haxby, J V -- Martin, A -- Ungerleider, L G -- Parasuraman, R -- AG07569/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 28;287(5453):643-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892-1366, USA. yjiang@codon.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10649996" target="_blank"〉PubMed〈/a〉
    Keywords: Cerebral Cortex/anatomy & histology/*physiology ; Face ; Frontal Lobe/anatomy & histology/*physiology ; Humans ; Magnetic Resonance Imaging ; Memory/*physiology ; Regression Analysis ; Visual Cortex/anatomy & histology/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Brain events underlying detection and recognition of weak sensory signals (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-03
    Description: Through the use of a quantitative extension of signal detection theory, the brain events associated with the detection and recognition of weak acoustic signals were examined by recording brain event-related potentials. The early N100 componenet of the event-related potential varied only with detection, whereas the late P300 component varied with both detection and recognition. P300 amplitude accurately predicted recognition performance on a trial-by-trial basis. The results suggest that detection and recognition are partially concurrent processes in perception and demonstrate that the electrocortical events occurring during the perception of sensory stimuli are closely associated with both detection and recognition of these stimuli by the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parasuraman, R -- Beatty, J -- New York, N.Y. -- Science. 1980 Oct 3;210(4465):80-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414324" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Auditory Perception/*physiology ; Brain/*physiology ; Electroencephalography ; Electrooculography ; *Evoked Potentials, Auditory ; Humans ; Noise ; Sound
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Visual sustained attention: image degradation produces rapid sensitivity decrement over time (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-15
    Description: Perceptual sensitivity to a visual target presented in a random continuous sequence of targets and nontargets decreased rapidly over time when stimuli were highly degraded visually but not when moderately degraded or undegraded. Large declines in sensitivity, independent of changes in response criterion, were found after only 5 minutes of observation. These rapid decrements of sensitivity to degraded targets seem to result from demands on the limited capacity of visual attention.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nuechterlein, K H -- Parasuraman, R -- Jiang, Q -- 784040-29867-5/PHS HHS/ -- MH 30911/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):327-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836276" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; *Attention ; Child ; Discrimination (Psychology) ; Female ; Humans ; Male ; Memory ; Time Factors ; *Visual Perception
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Memory load and event rate control sensitivity decrements in sustained attention (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-31
    Description: The capacity to sustain attention at an efficient level deteriorates over time in discrimination and monitoring tasks. This "vigilance decrement" results from a decrement in perceptual sensitivity only if (i) target discrimination loads memory and (ii) stimulus events occur rapidly; otherwise, the decrement reflects temporal changes in response criteria. These results provide a basis for distinguishing between the perceptual and response processes underlying the vigilance decrement that may be generalized across a range of tasks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parasuraman, R -- New York, N.Y. -- Science. 1979 Aug 31;205(4409):924-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472714" target="_blank"〉PubMed〈/a〉
    Keywords: Attention/*physiology ; Cognition/physiology ; Discrimination (Psychology)/*physiology ; Humans ; Memory/*physiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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