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Lab 33: Equilibrium

Lab 33: Equilibrium. Part A: On Your Own. Part B: Tests of Equilibrium. Objective: to demonstrate the importance of vision in the maintenance of equilibrium. Part B: Tests of Equilibrium. 1. Vision and Equilibrium Have a subject stand up on one foot for 1 minute with his/her eyes open

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Lab 33: Equilibrium

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  1. Lab 33: Equilibrium

  2. Part A: On Your Own

  3. Part B: Tests of Equilibrium • Objective: to demonstrate the importance of vision in the maintenance of equilibrium

  4. Part B: Tests of Equilibrium • 1. Vision and Equilibrium • Have a subject stand up on one foot for 1 minute with his/her eyes open • Observe the subjects degree of unsteadiness • Repeat: BUT THIS TIME, the subject’s eyes are CLOSED • Be prepared to keep them from falling

  5. 2. Romberg Test

  6. Romberg Test • Position the subject close to the whiteboard with their back toward the board • Place a bright light in front of the subject so that a shadow of the body is cast on the board • Have the subject stand with feet close together and eyes staring straight ahead for 3 minutes • Make marks on the chalkboard along the edge of the shadow of the subject’s shoulders to indicate the range of side-to-side swaying • Measure the maximum sway in cm • Record Results • Repeat the procedure with the subject’s eyes closed

  7. Part B: Tests of Equilibrium • Position subject so one side is toward the chalkboard • Repeat test: with eyes open • Repeat with eyes closed

  8. 3. Barany Test

  9. Barany Test • Have the subject sit on a swivel chair with his/her eyes closed, head tilted forward about 30°, and the hands gripped firmly to the seat • Position 3-4 people around the chair for safety • Be prepared to prevent the subject/chair from tipping over • Rotate the hair ten rotations within 20 seconds • Abruptly stop the movement of the chair • Have the subject open his/her eyes and note the nature of the eye movements and their direction • Also note how long it takes for the eyes to stop moving • Record observations

  10. Wait several minutes, then repeat the procedure with the subjects head tilted at a 90° onto one shoulder • After another rest period, repeat the procedure with the subject’s head bent forward so that the chin is resting on the chest

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