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Browsing by Author "Johnson, Micah A"
Now showing items 1-7 of 7
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Age-related differences in resolving semantic and phonological competition during receptive language tasks.
(Neuropsychologia, 2016-12)Receptive language (e.g., reading) is largely preserved in the aging brain, and semantic processes in particular may continue to develop throughout the lifespan. We investigated the neural underpinnings of phonological and ... -
Age-related differences in the neural bases of phonological and semantic processes in the context of task-irrelevant information.
(Cognitive, affective & behavioral neuroscience, 2019-08)As we age we have increasing difficulty with phonological aspects of language production. Yet semantic processes are largely stable across the life span. This suggests a fundamental difference in the cognitive and potentially ... -
Age-related differences in the neural bases of phonological and semantic processes.
(Journal of cognitive neuroscience, 2014-12)Changes in language functions during normal aging are greater for phonological compared with semantic processes. To investigate the behavioral and neural basis for these age-related differences, we used fMRI to examine younger ... -
Frontoparietal activation during visual conjunction search: Effects of bottom-up guidance and adult age.
(Hum Brain Mapp, 2017-04)We conducted functional magnetic resonance imaging (fMRI) with a visual search paradigm to test the hypothesis that aging is associated with increased frontoparietal involvement in both target detection and bottom-up attentional ... -
Global versus tract-specific components of cerebral white matter integrity: relation to adult age and perceptual-motor speed.
(Brain structure & function, 2015-09)Although age-related differences in white matter have been well documented, the degree to which regional, tract-specific effects can be distinguished from global, brain-general effects is not yet clear. Similarly, the manner ... -
Phonemic fluency and brain connectivity in age-related macular degeneration: a pilot study.
(Brain connectivity, 2015-03)Age-related macular degeneration (AMD), the leading cause of blindness in developed nations, has been associated with poor performance on tests of phonemic fluency. This pilot study sought to (1) characterize the relationship ... -
Sources of disconnection in neurocognitive aging: cerebral white-matter integrity, resting-state functional connectivity, and white-matter hyperintensity volume.
(Neurobiol Aging, 2017-06)Age-related decline in fluid cognition can be characterized as a disconnection among specific brain structures, leading to a decline in functional efficiency. The potential sources of disconnection, however, are unclear. ...
