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 high res (0.3 M) low res (54 K) | S61-04564 (1961) --- Astronaut John H. Glenn Jr.'s balance mechanism (semi-circular-canals) is tested by running cool water into his ear and measuring effect on eye motions (nystagmus). This exercise is called a modified calonic test. |
Curator: Kim
Dismukes | Responsible NASA Official: John Ira Petty | Updated: 08/08/2002 |
