Episode Details

Psychologist Russ Poldrack is a mind reader of sorts, but not in the traditional sense of the word. Instead, he makes movies of blood flow in the brain using functional MRI to draw insights into the function of specific regions of the brain to decipher how they control behavior. In one example, Poldrack has shown how people with obsessive-compulsive disorder have enhanced “salience networks” that turn on when surprising things happen. This finding could have “very profound” outcomes in diagnosis and treatment, Poldrack tells host Russ Altman in this wide-ranging exploration of the implications and the ethics of functional neuroimaging on Stanford Engineering’s The Future of Everything podcast.

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Episode Reference Links:

• Stanford Profile: Russ Poldrack
• Poldrack Lab website: http://poldracklab.org
• The MyConnectome project: https://www.myconnectome.org/
• Stanford Center for Open and Reproducible Science: https://datascience.stanford.edu/cores

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Chapters:

(00:00:00) Introduction

Russ Altman introduces guest Russ Poldrack, a professor of psychology and of psychiatry and behavioral science at Stanford University.

(00:03:15) Path into Neuroimaging

How Poldrack moved from cognitive psychology into functional MRI research.

(00:04:18) Functional MRI

How MRI can be used to track brain activity.

(00:06:59) Mapping Brain Activity

How tasks and behaviors are linked to patterns of brain activation.

(00:08:02) Resting Functional MRI

How resting scans revealed large-scale brain networks.

(00:09:00) Brain Networks and Behavior

How the brain controls stopping, switching, and habits.

(00:10:34) Layers of Brain Organization

Why neuroimaging studies the brain across multiple scales.

(00:13:04) Individual Brain Differences

How shared brain networks vary across individuals.

(00:13:34) Scanning Himself

Why Poldrack repeatedly scanned his own brain.

(00:15:47) Mapping One Brain Deeply

How repeated scans revealed reliable individual brain patterns.

(00:18:59) Neuroimaging and Mental Health