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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A pilot in Sukhoi aircraft is experiencing negative G. Which of the following physiological events will manifest in such situation?
assistant
The correct answer is  In negative gravity, the blood will no longer be held onto lower limbs. So lower limb venous pressure decrease and the venous return increases. This will cause the cardiac output to increase. Since no gravity, blood rushes to the head, and cause increased cerebral arterial pressure and red outs (mental confusion).