Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

STS-40 crewmembers conduct a vestibular experiment on Space Shuttle Columbia

(June 14, 1991) Vestibular experiment activities were captured onboard Columbia's Spacelab Life Sciences (SLS-1) module in this 35 mm scene. Astronaut and physician-engineer James P Bagian (b 1952), STS-40 mission specialist, is in a rotating chair while wearing an accelerometer and electrodes to record head motion and horizontal and vertical eye movements during the rotations. Payload Specialist and molecular biologist Millie Hughes-Fulford (1945-2021), lower left, assisted with the test. She also has electronystagmography contacts on her head, so she was also a participant in some of the experiments. (Source: NASA/Johnson Space Center [Houston]. NASA ID: STS040-211-020. Public domain.)