PSYC 405 Lecture Notes - Lecture 4: Aging Brain, Network Theory, Episodic Memory
6 Feb 2020
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Document Summary
Neuroscience and your textbook on adult development and. Proposes that intelligence comes from a distributed and integrated network of neurons in the parietal and frontal areas of the brain. Can older adults compensate for brain changes. Studies show that, when presented with similar tasks, younger adults exhibit focal, unilateral activity in left prefrontal region and older adults exhibit bilateral activity (both left and right prefrontal areas) Bilateral activation in older adults plays a supprtiverole in older adults cognitive function. Harold (hemispheric asymmetry reduction in older adults) Suggests bilaterally is compensatory in older adults with reduced cognitive ability. Crunch (compensation- related utilization of neural circuits hypothesis) Similar to harold but suggests additional mechanisms at work of aging brain over utilizing other regions in the left hemisphere on demanding task before going to the right hemisphere. Default network theory holds that when the cognitive demands are made on the brain the default network is suppressed.
