Skip to main content
. 2017 May 11;123(1):260–266. doi: 10.1152/japplphysiol.00091.2017

Fig. 1.

Fig. 1.

Internal jugular vein cross-sectional area (IJV CSA) during sitting, supine, head-down tilt (HDT), and HDT + lower-body negative pressure (LNBP) at −25 [LBNP(25)] and −50 [LBNP(50)] mmHg conditions. IJV CSA decreased significantly with LBNP (50 mmHg) relative to HDT with no LBNP. IJV CSA at sitting posture was significantly different from all other test conditions. 15HDT, 15° head-down tilt. **IJV CSA decreased significantly with LBNP (50 mmHg) relative to HDT with no LBNP. *IJV CSA at sitting posture was significantly different from all other test conditions.