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Spinal Elongation and its Effects on Seated Height in a Microgravity Environment (Spinal)The primary objective of this project is to provide information pertaining to changes in seated height due to spinal elongation in a microgravity environment. The proposed experiment aims to collect seated height data for subjects exposed to microgravity environments, provide information relating to seated height rate of change over time, and feed new information regarding the elongation of the spine forward into the design of Constellation systems. Historical data indicates that spinal elongation occurs when crewmembers are subjected to microgravity. In as little as two days, the typical crewmember will exhibit increases in stature of up to 3 percent. However, data has been collected only for crewmembers in standing postures, and a limited pool of subjects was available. Due to the criticality of seated height in the design of the Crew Exploration Vehicle (CEV), a better understanding of the effects of microgravity on seated height is necessary. Small changes in seated height that may not have impacted crew accommodation in previous programs will have significant effects on crew accommodation due to the layout of seats in the CEV. The proposed study will directly measure changes in seated height for crewmembers in the Shuttle cockpit. An anthropometer will be used to record measurements to the top of the head of a seated subject, and an orthogonal photograph will be taken in order to measure seated height based on scaling references of known sizes as well as verify the posture and positioning remained consistent throughout the study. Data gained from this study will provide better information to CEV designers. Accurate measurements of crew seated height will be valuable for vehicle and habitation designers for future programs as well.
Document ID
20090007782
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Rajulu, Sudhakar
(NASA Johnson Space Center Houston, TX, United States)
Young, Karen
(Lockheed Martin Corp. Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
February 2, 2009
Subject Category
Aerospace Medicine
Report/Patent Number
JSC-17759
Meeting Information
Meeting: Human Research Program Investigators'' Workshop
Location: League City, TX
Country: United States
Start Date: February 2, 2009
End Date: February 4, 2009
Sponsors: Universities Space Research Association
Distribution Limits
Public
Copyright
Other

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