Healthy Clinical Trial
Official title:
Carbon Dioxide (CO2): A Pilot Study of a Hypothesized Mechanism to Explain Cognitive Impairment
The purpose of the study is to better understand the biological mechanisms of carbon dioxide (CO2)-induced cognitive impairments.
Participants will complete 2 study visits. Each study visit will consist of a 2.5-hour exposure session. Concentrations of CO2 during the exposure session will be either 600 ppm (control) or 2500 ppm (exposure). The order of the exposure sessions will be randomized and the exposure sessions will be at least one week apart. Up to two participants will take part in each exposure session. During each exposure a neurobehavioral assessment (Strategic Management Simulations or SMS) will be administered. Venous blood (30 mL) will be collected from subjects immediately before entering the chamber and immediately after the exposure. A subset of subjects (n=12) will also undergo a 60-minute fMRI scan. ;
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