期刊
EXPERIMENTAL BRAIN RESEARCH
卷 204, 期 4, 页码 617-622出版社
SPRINGER
DOI: 10.1007/s00221-010-2317-0
关键词
Artificial gravity; Spatial orientation; Vestibular; Centrifuge; Microgravity
资金
- JSC
- UTMB GCRC
- Neurosciences Laboratory at JSC
- NASA [NNJ04HD66G, NNJ04HF51G]
- NIH, GCRC at the University of Texas Medical Branch, Galveston, TX [M01 RR 0073]
We studied spatial orientation before and after 21 days of 6A degrees head-down bed rest in 15 subjects. During bed rest, 8 subjects were treated daily with 1 h Gz centrifugation (artificial gravity) (2.5 g at the feet; 1.0 g at the heart), with 7 subjects serving as controls. Ocular counter-rolling and subjective visual vertical were assessed during 90A degrees whole body roll tilt to the left and right. Ocular counter-rolling was unaffected by bed rest and bed rest + artificial gravity. Performance on the subjective visual vertical task was unchanged in the control group, but exhibited a significant increase in error for 48 h after bed rest in the treatment (artificial gravity) group. Intermittent application of linear acceleration along the long body axis may have increased the weighting of the idiotropic vector, resulting in an increased bias of the subjective visual vertical toward the long body axis during 90A degrees roll tilt.
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