Communications are tested so the crew can talk clearly with each other and mission control, and the suit interfaces with Orion are verified so oxygen, cooling and other safety functions will work as intended.
But there are a few exceptions where the brain directly interfaces with blood, including in the circumventricular organs, deep in the brain near the hypothalamus.
—
Dan Samorodnitsky,
Quanta Magazine,
11 Aug. 2025
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