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Executive dysfunction, brain aging, and political leadership

Published online by Cambridge University Press:  18 January 2016

Mark Fisher,
David L. Franklin and
Jerrold M. Post
Mark Fisher
Affiliation:
Departments of Neurology and Political Science University of California, Irvine Irvine, CA 92697 mfisher@uci.edu
David L. Franklin
Affiliation:
School of Medicine University of California, Riverside 900 University Avenue Riverside, CA 92521 dlfrankl@medsch.ucr.edu
Jerrold M. Post
Affiliation:
Elliott School of International Affairs The George Washington University 1957 E Street, N.W. Washington, DC 20052 jpost@gwu.edu

Abstract

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Decision-making is an essential component of executive function, and a critical skill of political leadership. Neuroanatomic localization studies have established the prefrontal cortex as the critical brain site for executive function. In addition to the prefrontal cortex, white matter tracts as well as subcortical brain structures are crucial for optimal executive function. Executive function shows a significant decline beginning at age 60, and this is associated with age-related atrophy of prefrontal cortex, cerebral white matter disease, and cerebral microbleeds. Notably, age-related decline in executive function appears to be a relatively selective cognitive deterioration, generally sparing language and memory function. While an individual may appear to be functioning normally with regard to relatively obvious cognitive functions such as language and memory, that same individual may lack the capacity to integrate these cognitive functions to achieve normal decision-making. From a historical perspective, global decline in cognitive function of political leaders has been alternatively described as a catastrophic event, a slowly progressive deterioration, or a relatively episodic phenomenon. Selective loss of executive function in political leaders is less appreciated, but increased utilization of highly sensitive brain imaging techniques will likely bring greater appreciation to this phenomenon. Former Israeli Prime Minister Ariel Sharon was an example of a political leader with a well-described neurodegenerative condition (cerebral amyloid angiopathy) that creates a neuropathological substrate for executive dysfunction. Based on the known neuroanatomical and neuropathological changes that occur with aging, we should probably assume that a significant proportion of political leaders over the age of 65 have impairment of executive function.

Keywords

Executive functionpresidential disabilitybrain agingcerebral microbleedsfrontal lobeprefrontal cortex

Information

Type
Perspectives
Information
Politics and the Life Sciences , Volume 33 , Issue 2 , Fall 2014, pp. 93 - 102
Copyright
Copyright © Association for Politics and the Life Sciences 

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