NASA Photo ID: S61-04564           File Name: 10073601.jpg
Film Type: 8x10                    Date Taken: 12/12/61
Title: Astronaut John Glenn tests balance mechanism performance
Description:
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 view is labeled a modified calonic test.                   

Subject terms:
ASTRONAUT TRAINING                      
ASTRONAUTS                              
BALANCE                                 
BIOMEDICAL DATA                         
EQUILIBRIUM                             
EYE MOVEMENTS                           
LIFE SCIENCES                           
MERCURY PROJECT                         
NYSTAGMUS                               
TESTS                                   

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