NASA Photo ID: S64-14849           File Name: 10073628.jpg
Film Type: 4x5                     Date Taken: 02/12/64
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).                    
Subject terms:
ASTRONAUT TRAINING                      
ASTRONAUTS                              
BALANCING                               
BIOMEDICAL DATA                         
EQUILIBRIUM                             
EYE MOVEMENTS                           
LIFE SCIENCES                           
MERCURY PROJECT                         
NYSTAGMUS                               
TESTS
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